| principle(noun, line, idea, evidence, notion) |
| probability(noun, belief, conjecture, assumption, suspicion) |
| proof(noun, idea, argument, evidence, principle) |
| proposal(noun, line, notion, theory, proposition) |
| qualification(theory, guesstimate, premise) |
| reason(noun, belief, conjecture, assumption, suspicion) |
| reck(theory, guesstimate, premise) |
| research(notion, theory, proposition) |
| say so(expression, theory, guesstimate, premise) |
| self-evident truth(expression, theory, guesstimate, premise) |
| sentiment(noun, line, notion, theory, proposition) |
| shot(noun, belief, conjecture, assumption, suspicion) |
| shot in the dark(noun, expression, idiom, idea, belief) |
| sine qua non(expression, idiom, theory, guesstimate, premise) |
| speculation(noun, idea, belief, guess, conjecture) |
| stab(noun, belief, conjecture, assumption, suspicion) |
| supposal(noun, theory, guesstimate, qualification, supposition) |
| suppose(noun, condition, idea, belief, guess) |
| surmisal(theory, guesstimate, premise) |
| surmise(noun, idea, belief, guess, notion) |