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(Click for frequent words.) 67 perplexing 65 thorny 64 intractable 63 vexed 63 thorniest 63 nettlesome 61 knotty 59 conundrum 57 troublesome 57 knottiest 56 conundrums 55 seemingly unsolvable 54 puzzling 53 problematic 52 thornier 52 pressing 52 baffling 52 daunting 52 quandary 52 dilemma 52 seemingly intractable 51 troubling 51 bedeviling 51 trickiest 51 knottier 51 touchy 50 contentious 50 dilemmas 50 plaguing 50 riddle 50 Solving 49 irksome 49 quandaries 49 thorny issue 49 bedeviled 49 touchiest 48 ticklish 48 hotly debated 48 unsolvable 48 seemingly insoluble 47 exasperating 47 irresolvable 47 unresolved 47 insolvable 47 vexes 47 grapple 47 prickly 46 maddening 46 politically touchy 46 mystifying 46 enduring mysteries 46 confounding 46 solves 46 befuddling 46 bedevils 46 complicated 45 intriguing 45 thorniest issues 45 confronting 45 nagging 45 preoccupying 45 tricky 45 solve 44 bothersome 44 problem 44 solvable 43 bedevil 43 unanswerable questions 43 oversimplifies 43 insoluble 43 touchy topic 43 crux 43 untackled 43 worrisome 43 stickiest 43 problematical 43 solving 42 question 42 dicey 42 diciest 42 weighty 42 therein lies 42 serious 42 unsolvable puzzle 42 dauntingly complex 42 unanswerable 42 quandry 41 enigma 41 Biscardi fielded 41 weightiest 41 existential dilemmas 41 preoccupies 41 enigmas 41 Therein lay 41 dilemna 41 imponderable 41 elusive 41 plagues 41 fiercely debated 41 unanswerable question 41 grappling 41 grappled 41 salient 40 festering 40 largely unaddressed 40 unsettling 40 paradox 40 Therein lies 40 unfixable 40 Persistent joblessness 40 bewildering 40 solved 40 Resolving 40 intractable conflicts 40 intractability 40 trickier 40 challenges 40 Tut lineage 40 Therein lays 40 puzzlements 40 Tim McAlindon Tufts 40 unasked question 40 glaring deficiency 40 unappetizing 39 perplexes 39 head scratcher 39 peculiar 39 Pensacola Fla. Jena Passut 39 frustrating 39 vex 39 simultaneous equations 39 fraught 39 tantalizing 39 politically fraught 39 WabiSabiLabi auctions 39 glaring 39 Let OnSite Mechanic 39 Bob Dolgan Have 39 feline overpopulation 39 Gillispie inherits 39 persistent 39 Lawsuit begs 39 veritable minefield 38 mystery 38 prickliest 38 unsolved mysteries 38 straighforward 38 tensest moments 38 ponder 38 seemingly insolvable 38 complex 38 ancient otherworldly baddies 38 pertinent 38 unpalatable 38 disconcerting 38 Advertisement Pandit Antaryaami Jee 38 David Tollerud 38 ulcer inducing 38 hotbutton 38 difficult 38 inconvenient 38 lingering 38 pesky 38 touchy subject 38 moral conundrums 38 ardent proponents 38 endearing trait 38 seemingly insurmountable challenges 38 challenging 38 modifying subs 37 infuriating 37 formidable obstacle 37 eminently solvable 37 besetting 37 ethical minefield 37 recalcitrant 37 intraparty disputes 37 germane 37 mysteries 37 community@legalweek.com 37 hateful parasitic 37 dogging 37 enigma wrapped 37 bugaboos 37 paradoxical 37 Dunstan McNichol covers 37 costly 37 Herein lays 37 daunting task 37 paradoxes 37 inscrutable 37 problems 37 perilous 37 Sisyphean task 37 Achilles Heel 37 extricates itself 37 facing 37 Poincare Conjecture 37 seemingly irresolvable 37 myriad 37 Villepin sputtering 37 Riemann Hypothesis 37 challenge 37 theproblem 37 starkest contrasts 37 perplexities 37 complexities 37 defies conventional wisdom 37 Vexing 37 Remedying 37 answer 37 touchiest issues 37 ethical conundrums 36 master Will Shortz 36 problems besetting 36 brainteaser 36 baffling mysteries 36 concern TrendSetter 36 politically perilous 36 moral quandaries 36 ails 36 important 36 issue 36 weighty topics 36 Amerithrax mystery 36 besets 36 below concisely summarizes 36 Herein lies 36 inexorably intertwined 36 puzzle 36 controversial 36 perilous pin placements 36 dilema 36 discomfiting 36 Cautionary tale 36 sticky wicket 36 mystifies 36 Pet overpopulation 36 esoteric 36 dispiriting 36 Taxonomists seek 36 confusing 36 Fixing 36 divisive 36 interesting 36 Gordian knot 36 tantalizing prospect 36 adroitly sidestepped 36 questions 36 Achilles heel 36 confronts 36 riddles 36 existential dilemma 36 galling 36 glaring shortcoming 36 Incredulous lawmakers 36 insurmountable hurdle 36 Steven Pearlstein columns 36 glaring flaw 36 bugaboo 35 looming 35 seeming paradox 35 fiendishly difficult 35 touchier 35 murkiest 35 genetically altered pigs 35 trickier proposition 35 gravest 35 rankling 35 fascinating 35 convoluted 35 intricate puzzles 35 confront 35 nagging doubts 35 profane smeared mascara 35 tractable 35 woes besetting 35 unanticipated geologic 35 goalkeeping conundrum 35 disquieting 35 Unresolved 35 festered 35 peskiest 35 neuralgic 35 moral dilemmas 35 sidesteps 35 Typifying arguments 35 issues 35 discomforting 35 wonkiest 35 treaded lightly 35 unnerving 35 mustering quorum 35 confounded 35 NAT firewall traversal 35 unanswered questions 35 afflicting 35 interesing 35 Bulging bellies 35 obvious 35 surmountable 35 profound implications 35 unappealing 35 seemingly insuperable 35 pondering 35 preoccupy 35 K lite Codec 35 polarizing 35 plagued 35 exasperates 35 preoccupied 35 simplest 35 theodicy 35 Ferriero impartiality 35 perennial 35 oft neglected 35 Esterow attributed 35 sticky 35 venture above timberline 34 Algae dyed 34 existential 34 bugbear 34 Consults blog 34 Conundrum 34 Brownell inherits 34 stumped mathematicians 34 posed 34 stumpers 34 topic du jour 34 trivial 34 Antibiotic resistance 34 stumbling block 34 messy 34 Eartha Rigsby 34 replied jovially 34 unresolvable 34 debatable 34 Trahtman 34 abstruse 34 complicating 34 pressingly 34 poses 34 questions Weisfuse 34 murky 34 looms 34 Untangling 34 duct tape alleviates 34 ills 34 irritating 34 Riemann hypothesis 34 Mark Recchi Slava Kozlov 34 insuperable 34 confounds 34 befuddles 34 hotly debated topic 34 intransigent 34 Tackling 34 irresistible temptation 34 Complicating 34 Diagnosing 34 seemingly insurmountable 34 glaringly obvious 34 imponderables 34 devilishly difficult 34 underfishing 34 annoying 34 panacea 34 excruciating 34 flummoxed 34 chal lenges 34 Overt racism 34 debated ad nauseum 34 workable 34 Problems 34 resolvable 34 uncomforting 34 chronic 34 unwieldy 34 fundamental 34 existential quandaries 34 prosaic 34 Puzzling 34 proximate causes 34 remarkably adept 34 doozy 34 flummoxes 34 balky 34 therein lays 34 beset 34 cars unaccountably accelerating 34 perplex 34 resolve 34 ailments afflicting 33 Which brings 33 crucial 33 complicates 33 assiduously avoids 33 cosmic mysteries 33 active . Top [002] 33 obtuse 33 upstate downstate 33 unsettled 33 Trickier 33 Poincaré conjecture 33 QUESTIONS Have 33 weightier 33 Problem 33 perplexed 33 Solve 33 dimly understood 33 As rancor swirls 33 linebackers Shawne Merriman 33 boils down 33 frustrates 33 ruinously expensive 33 nonissues 33 logistical hurdles 33 strangest 33 philosophical 33 muddled 33 nub 33 Red Sox wearied 33 pernicious 33 bureaucratic logjams 33 grapples 33 toughest 33 stubborn 33 elegantly solves 33 enigmatic 33 Daunting 33 Separation anxiety 33 Dissecting 33 unfairnesses 33 philosophical conundrums 33 artfully dodged 33 glaring weakness 33 inescapable 33 hydra headed 33 rankles 33 intriguing subplots 33 assembling coalitions 33 decidedly bleak 33 diagnose depressive 33 daunts 33 Hydros mission 33 ills plaguing 33 tempting 33 complicating factor 33 headache 33 arcane 33 heatedly debated 33 #G/#G networks 33 marital misadventures 33 unsolved 33 critical 33 pondered 33 useless appendix 33 inopportune 33 intertwined 33 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worldviews 32 comments regarding www.Florida 32 AThis 32 agonizing 32 parasitic flies 32 glaringly apparent 32 disenchanting 32 Zeroing 32 bioethical questions 32 picayune 32 apt metaphor 32 ensnarled 32 Fermi paradox 32 omnivore dilemma 32 incongruously pristine backdrop 32 perennial patsy 32 discomfit 32 CrackBerry addiction 32 readmit Honduras 32 Finding 32 potent 32 TeenGrowth board 32 cryptic puzzles 32 stumbling blocks 32 indelicate 32 Contact billing@pookandpook.com 32 neatly sidestepped 32 seeming contradiction 32 Benedict papacy 32 moral dilemma 32 antagonistic postures toward 32 agonize 32 skeptics 32 prevalant 32 Bardissi Enterprises welcomes 32 bugbears 32 agent Kimberly Mertz 32 crises afflicting 32 festering sore 32 figuring 32 answers 32 byzantine 32 cyberbullying Steyer 32 frustratingly elusive 32 hopelessly mired 32 pettier 32 fixable 32 Preoccupied 32 expensive 32 insidious 32 unenviable 32 yearlong condiment 32 Marital infidelity 32 ethical dilemma 32 Dale McFeatters SHNS 32 pertains 32 lengthiest 32 Inconsistent 32 protracts 32 dogged 32 unaddressed 32 sidestep 32 endlessly fascinating 32 unsolved riddle 32 reauthorizing NCLB 32 unpopular 32 community BIOTRONIK assesses 32 distressingly familiar 32 imbroglio 32 politically sensitive 32 reporter Jamison Hensley 32 devious puzzles 32 decisively outnumber 32 nebulous 32 widening chasm between 32 Rotisserie baseball 32 Redressing 32 debated ad nauseam 32 drearily familiar 32 straightforward 32 Ethical dilemmas 32 disturbing 32 Memo Rojas encountered 32 Rubic Cube 32 Empire des Enfants 32 simple Evet 32 seemingly paradoxical 32 bizarre 32 bemusing 32 hotly debating 32 mailto editor@mcpmag.com 32 trenchant 32 Jitka Hanakova 32 arduous 31 Debate rages 31 ip.access nanoGSM ® 31 PITTSBURGH Randy Pausch 31 option = com content 31 rings tru however 31 seemingly innocuous 31 irredeemably flawed 31 tackling 31 glaring deficiencies 31 indirectness 31 Teddy Roosevelt grappled 31 underrecognized 31 boomers 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topic 31 Affording 31 dizzying array 31 pullout resisters 31 Therein lie 31 Pressing Questions 31 dealing 31 Leaders exuded confidence 31 shortcoming 31 eludes 31 debilitating 31 algebraic equation 31 isn'ta panacea 31 fix 31 strange quirk 31 seri ous 31 Slippery slope 31 Whither 31 Sectarian divisions 31 Clan rivalries 31 urgent 31 jargony 31 tortuous 31 fractious 31 unpleasant 31 Iris Rutkoski 31 doubled seeming contradiction 31 Excising 31 inextricably tied 31 Sandlers retire 31 glaring weaknesses 31 SNAFUs 31 unifying thread 31 sobering 31 facet 31 stirred passions 31 Nagging 31 multifaceted 31 raisons d' être 31 transcends partisanship 31 ardent backers 31 maddeningly opaque 31 inconstant 31 bane 31 inter twined 31 Bogged down 31 deftly sidestepped 31 bluntest 31 illegally transporting bubonic 31 dreaded 31 painfully obvious 31 fiendish puzzles 31 Abidjan lagoons 31 Pondering 31 Ruttenberg focuses 31 telltale fingerprints 31 Pietro Nivola senior 31 Our Voltimum Experts 31 ungraspable 31 impenetrable maze 31 feared sluggers 31 knottiest problems 31 loom 31 inconsistency 31 call Stew Casterline 31 Extramarital affairs 31 pesty 31 Haley Sheheen 31 Weekly.com please contact 31 fascinates 31 easily resolvable 31 nonscientist 31 vociferous critics 31 niggling 31 inherent contradictions 31 spokeswoman Angelic Dolan 31 pervasive 31 exasperated 31 woefully inept 31 Herculean tasks 31 Confronting 31 mired 31 Staying abreast 31 dipping crosscourt forehand 31 temptations weigh ins 31 obstacle 31 Curtains jaunty musical 31 perturbs 31 resolves 31 irks 31 flashpoint 31 risky proposition 31 internecine rivalries 31 unclarified 30 comments regarding www.miningjournal.net 30 Poincaré Conjecture 30 dangerous 30 fallacious logic 30 memorize equations 30 nightmarish 30 enduring 30 neatly summarizes 30 blinkx founders set 30 seemingly contradictory 30 seemingly irreconcilable 30 happening Peardon 30 Logistical challenges 30 beleaguer 30 stymied 30 riddles puzzles 30 recurrent theme 30 Trichet reticence 30 Pinpointing 30 unusual 30 anathema 30 prevalent 30 unsurmountable 30 Sidestepping 30 brow furrowing 30 arguers 30 TSX AHX AMEX ADH 30 Wolsborn 30 bitterest 30 gripe 30 Defiantly pursuing 30 uneasy bedfellows 30 active . 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Top 30 mysteries whatdunit whodunit 30 devilishly tricky 30 Hand wringing 30 mind bending 30 apropos 30 deeply divided 30 hotly disputed 30 stark 30 Weighty 30 trilemma 30 SolomonEdwardsGroup LLC 30 Robert Schwaneberg covers 30 animal overpopulation 30 yoga buzzkill 30 twin specters 30 taboo 30 Maqu refused 30 nickname Old Ironpants 30 Intractable 30 Rubik Cube puzzle 30 indigene settler 30 outspoken critics 30 monthlong recess looming 30 Glitch snarls air 30 algebra equations 30 broach 30 mind boggling 30 SEATTLE WA #-#-# 30 please visit www.txmstr.com 30 starkly evident 30 deftly sidestepping 30 diplomatic minuet 30 woefully underdeveloped 30 Achille heel 30 Clouding 30 brain computes Chesnais 30 Poincare conjecture 30 garage tinkerers 30 Rubik cube 30 hotly contested 30 Toughest Questions 30 H.# WMV9 MPEG 30 testy 30 onerous task 30 Rhetorical question 30 seemingly insurmountable obstacles 30 enduring legacies 30 paperwork Akeena Solar 30 Suddenly Kuznetsov 30 trial Sadeddin 30 Adrian Peterson fumbling 30 medicaledge@mayo.edu 30 thorny seemingly intractable 30 succinctly summarized 30 frustratingly 30 trumpeter swan habitat 30 policy wonks 30 reoccurring theme 30 counterintuitive 30 insurmountable 30 discussable 30 silver buckshot 30 malady 30 Richard Gelles dean 30 cap fit snugly 30 Faina hijacking 30 Fermat Last 30 Carolyn Lammersfeld 30 uncomfortable truths 30 graver threat 30 glaring el Masri 30 thankless task 30 Lawyer Cristina Arguedas 30 Cypriot Christopher Pissarides 30 poorly understood 30 e mail webeditor@sfnewmexican.com 30 noteworthy 30 immutable truths 30 Thorny 30 PITTSBURGH Trudging 30 seemingly intractable conflicts 30 sidestepping 30 loomed 30 incommensurability 30 Ronald Peleo Lazar 30 defused thorny 30 fiendishly complex 30 probem 30 aggravating 30 MCPmag.com editors 30 wildly unpopular 30 nonissue 30 hopelessly bogged 30 At SharesPost Brogger 30 Some perennial puzzlers 30 inane 30 sidestepped 30 uncontentious 30 notably 30 alarming 30 clashing civilizations 30 inventive 30 lip pursing 30 whatever ails 30 weighty matters 30 closely intertwined 30 myriads 30 Rich Hallabran spokesman 30 Shakespeare authorship 30 challeges 30 Chafee Laffey 30 flummox 30 Fermi Paradox 30 Misinformation abounds 30 Partisan gridlock 30 murkier 30 vivid illustration 30 debated 30 GamesIndustry.biz Editorial 30 troubles 30 sophomores listened attentively 30 arises 30 poses knotty 30 Broadband Telematics 30 beta lactamase inhibitors 30 Retiring boomers 30 inexact science 30 Difficult 30 intriguing storylines 30 Wrangling 30 intelligent lifebuoy 30 useful 30 cockeyed optimists 30 glooming 30 Unhappiness 30 apt 30 frankest 30 NA Dec 1/NA 30 fiendishly complicated 30 highly publicized 30 nebulousness 30 keynoter Warner 30 problematically 30 entwined 30 headscratching 30 Xavier Justin Doellman 30 tepidness 30 Staving off 30 Lee Smolin 30 topic 30 satisfying 30 underlining expeditiously 30 infernally 30 monumental task 30 brain teasers 30 literal minded 30 Inescapably 30 unwelcome distraction 30 chief doctrinal watchdog 30 Utopian vision 30 palliated 29 secretly taped Cowdery 29 frightening 29 unfathomable 29 amply illustrates 29 definitional 29 Earmark reform 29 inextricable 29 Extrajudicial killing 29 egregious 29 un provable 29 Somali pirate hijackings 29 Anthropogenic global warming 29 everchanging 29 Troubling 29 key 29 dysfunctionality 29 Daniel J. Solove 29 Overpopulation 29 Convincing 29 locked horns 29 fundamentally misunderstand 29 socioeconomic inequality 29 risk Slurpee brainfreeze 29 Antibiotic overuse 29 eagerly anticipated 29 surprising 29 enlightening 29 Bench warmers 29 ideological overreach 29 Dr. Sugata Mitra 29 Squabbles 29 glaring shortcomings 29 worldchanging 29 bureaucratic sloth 29 Beltway pundits