Related by context. Frequent words. (Click for all words.) 39 dubious 38 riddles 37 algebraic 37 unsolvable 37 riddle 37 conjecture 36 theorems 35 inexact science 35 elusive 35 mathematical 34 mystery 34 worthy 34 theoretical 33 enigmas 33 merit 33 mathematicians 33 empirical 32 metaphysics 32 conjectures 32 cosmology 32 validity 32 theorem 31 seemingly intractable 31 thorniest 31 whodunit 31 pseudo scientific 31 metaphysical 31 jurisprudential 31 weighty 31 incontrovertible 31 semantics 31 deserving 31 abstract concepts 31 mathematical equation 31 headline grabbing 30 meritorious 30 intractable 30 knotty 30 wishful thinking 30 true 30 prestigious 30 myriad 30 unmerited 30 unsolved 30 mathematician 30 excellence 30 empirically 30 abstruse 30 puzzle 30 irrefutable 30 supposition 30 solving 30 Holy Grail 29 maybes 29 unimportant 29 spurious 29 coveted 29 nettlesome 29 subjective 29 worth 29 mathematic 29 mathematical concepts 29 mysteries 29 academic excellence 29 Dubious 29 epistemology 29 enigma 29 scholastic achievement 29 unworthy 29 illusive 29 ephemeral 29 disputable 29 irrelevant 29 brain teasers 29 purely 29 academic achievement 29 problem solving 29 whodunnit 28 merely 28 convoluted 28 alchemical 28 conundrums 28 complicated 28 mutually exclusive 28 equations 28 trivial 28 thorniest issues 28 eternal 28 artistic merit 28 worthier 28 esoteric 28 moral dilemmas 28 inexact 28 achievement 28 motives 28 demystifying 28 fallacious 28 loftier 28 fiction 28 conundrum 27 arcane