Humean, Pyrrhonic, a bit thick, a bit thin, absurd, agnostic, ambiguous, amoral, arguable, at issue, beyond belief, borderline, chancy, clouded, confutable, conjectural, conscienceless, contestable, contingent, controversial, controvertible, corrupt, corrupted, criminal, crooked, dark, debatable, deniable, devious, dishonest, dishonorable, disputable, disreputable, distrustful, doubtable, doubting, dubious, dubitable, equivocal, evasive, felonious, fishy, fraudulent, from Missouri, hard of belief, hard to believe, hardly possible, hazy, hesitant, hesitating, iffy, ill-got, ill-gotten, immoral, implausible, improbable, in dispute, in doubt, in dubio, in question, inconceivable, incredible, incredulous, indecisive, indefinite, indeterminate, indirect, insecure, insidious, leery, mistakable, mistrustful, mistrusting, moot, more than doubtful
, not deserving belief, not kosher, obscure, open, open to doubt, open to question, open to suspicion, passing belief, precarious, preposterous, problematic, queasy, questionable, questioning, refutable, ridiculous, rocky, rotten, sceptical, scrupulous, shady, shaky, shameless, shifty, shy, sinister, skeptic, skeptical, slippery, speculative, staggering belief, suppositional, suspect, suspecting, suspicious, tall, thick, thin, tottery, touch-and-go, treacherous, tricky, unbelievable, uncertain, unclear, unconscienced, unconscientious, unconscionable, unconvinced, unconvincing, undecided, undependable, underhand, underhanded, unearthly, uneasy, unethical, ungodly, unhealthy, unimaginable, unlikely, unpredictable, unprincipled, unpromising, unreliable, unresolved, unsafe, unsavory, unscrupulous, unsettled, unsound, unstable, unsteady, unstraightforward, unsure, unthinkable, untrusting, untrustworthy, unworthy of belief, vacillating, vague, wary, without remorse, without shame
inquiry, request, search, research, quest, pursuit, examination, review, scrutiny, investigation, indagation, perquisition, perscrutation, pervestigation, inquest, inquisition, exploration, exploitation, ventilation, sifting, calculation, analysis, dissection, resolution, induction, Baconian method, strict inquiry, close inquiry, searching inquiry, exhaustive inquiry, narrow search, strict search, study, scire facias, ad referendum, trial, questioning, interrogation, interrogatory, interpellation, challenge, examination, cross-examination, catechism, feeler, Socratic method, zetetic philosophy, leading question, discussion, reconnoitering, reconnaissance, prying, espionage, espionnage, domiciliary visit, peep behind the curtain, lantern of Diogenes, question, query, problem, desideratum, point to be solved, porism, subject of inquiry, field of inquiry, subject of controversy, point in dispute, matter in dispute, moot point, issue, question at issue, bone of contention, plain question, fair question, open question, enigma, knotty point, quodlibet, threshold of an inquiry, inquirer, investigator, inquisitor, inspector, querist, examiner, catechist, scrutator scrutineer scrutinizer, analyst, quidnunc, inquiry, inquisitive, requisitive, requisitory, catechetical, inquisitorial, analytic, in search of, in quest of, on the lookout for, interrogative, zetetic, all searching, undetermined, untried, undecided, in question, in dispute, in issue, in course of inquiry, under discussion, under consideration, under investigation, sub judice, moot, proposed, doubtful
, quaere?, what?, why?, wherefore?, whence?, whither?, where?, how comes it?, how happens it?, how is it?, what is the reason?, what's the matter?, nicht wahr?, what's in the wind?, what on earth?, when?, who?.
uncertainty, incertitude, doubt, doubtfulness, dubiety, dubitation, dubitancy, dubitousness, hesitation, suspense, perplexity, embarrassment, dilemma, bewilderment, timidity, vacillation, diaporesis, indetermination, vagueness, haze, fog, obscurity, ambiguity, contingency, dependence, dependency, double contingency, possibility upon a possibility, open question, onus probandi, blind bargain, pig in a poke, leap in the dark, something or other, needle in a haystack, needle in a bottle of hay, roving commission, precariousness, fallibility, uncertain, casual, random, changeable, doubtful
, dubious, indecisive, unsettled, undecided, undetermined, in suspense, open to discussion, controvertible, in question, vague, indeterminate, indefinite, ambiguous, equivocal, undefined, undefinable, confused, mystic, oracular, dazed, perplexing, enigmatic, paradoxical, apocryphal, problematical, hypothetical, experimental, unpredictable, unforeseeable (unknowable), fallible, questionable, precarious, slippery, ticklish, debatable, disputable, unreliable, untrustworthy, contingent, contingent on, dependent on, subject to, dependent on circumstances, occasional, provisional, unauthentic, unauthenticated, unauthoritative, unascertained, unconfirmed, undemonstrated, untold, uncounted, in a state of uncertainty, in a cloud, in a maze, bushed, off the track, ignorant, afraid to say, out of one's reckoning, astray, adrift, at sea, at fault, at a loss, at one's wit's end, at a nonplus, puzzled, lost, abroad, d_esorient_e, distracted, distraught, pendente lite, sub spe rati, Heaven knows, who can tell? who shall decide when doctors disagr.
unbelief doubt, unbelief, disbelief, misbelief, discredit, miscreance, infidelity, dissent, change of opinion, retraction, doubt, skepticism, scepticism, misgiving, demure, distrust, mistrust, cynicism, misdoubt, suspicion, jealousy, scruple, qualm, onus probandi, incredibility, incredibleness, incredulity, doubter, skeptic, cynic, unbeliever, unbelieving, skeptical, sceptical, incredulous as to, skeptical as to, distrustful as to, shy as to, suspicious of, doubting, doubtful
, disputable, unworthy of, undeserving of belief, questionable, suspect, suspicious, open to suspicion, open to doubt, staggering, hard to believe, incredible, unbelievable, not to be believed, inconceivable, impossible, fallible, undemonstrable, controvertible, cum grano salis, with a grain of salt, with grains of allowance, fronti nulla fides, nimium ne crede colori, timeo Danaos et dona ferentes, I fear the Greeks even when bearing gifts, beware of Greeks bearing gifts, credat Judaeus Apella, let those believe who may, ad tristem partem stenua est suspicio.