rule of thumb(n = noun.cognition) guideline, guidepost - a rule or principle that provides guidance to appropriate behavior;
is a kind of regulation, rule

N  unskillfulness, want of skill, incompetence, incompentency, inability, infelicity, indexterity, inexperience, disqualification, unproficiency, quackery, folly, stupidity indiscretion, thoughtlessness, sabotage, mismanagement, misconduct, impolicy, maladministration, misrule, misgovernment, misapplication, misdirection, misfeasance, petticoat government, absence of rule, rule of thumb, bungling, failure, screw loose: too many cooks, blunder, etourderie gaucherie, act of folly, balourdise, botch, botchery, bad job, sad work, sprat sent out to catch a whale, much ado about nothing, wild- goose chase, bungler, fool, unskillful, inexpert, bungling, awkward, clumsy, unhandy, lubberly, gauche, maladroit, left-handed, heavy-handed, slovenly, slatternly, gawky, adrift, at fault, inapt, unapt, inhabile, untractable, unteachable, giddy, inconsiderate, stupid inactive, incompetent, unqualified, disqualified, ill-qualified, unfit, quackish, raw, green, inexperienced, rusty, out of practice, unaccustomed, unused, untrained &c, uninitiated, unconversant, shiftless, unstatesmanlike, unadvised, ill-advised, misadvised, ill-devised, ill-imagined, ill-judged, ill-contrived, ill-conducted, unguided, misguided, misconducted, foolish, wild, infelicitous, penny wise and pound foolish, one's fingers being all thumbs, the right hand forgets its cunning, il se noyerait dans une goutte d'eau, incidit in Scyllam qui vult vitare Charybdim, out of the frying pan into the fire, non omnia possumus omnes.

N  experiment, essay, analysis, screen, trial, tentative method, t=atonnement, verification, probation, experimentum crucis, proof, (demonstration), criterion, diagnostic, test, probe, crucial test, acid test, litmus test, crucible, reagent, check, touchstone, pix, assay, ordeal, ring, litmus paper, curcuma paper, turmeric paper, test tube, analytical instruments, empiricism, rule of thumb, feeler, trial balloon, pilot balloon, messenger balloon, pilot engine, scout, straw to show the wind, speculation, random shot, leap in the dark, analyzer, analyst, assayist, adventurer, experimenter, experimentist, experimentalist, scientist, engineer, technician, subject, experimentee, guinea pig, experimental animal, protocol, experimental method, blind experiment, double-blind experiment, controlled experiment, poll, survey, opinion poll, epidemiological survey, retrospective analysis, retrospective survey, prospective survey, prospective analysis, statistical analysis, literature search, library research, tryout, audition, discovery, measurement, evidence, deduction, induction, abduction, experimental, empirical, probative, probatory, probationary, provisional, analytic, docimastic, tentative, unverified, unproven, speculative, untested, on trial, under examination, on probation, under probation, on one's trial, on approval, check it out, give it a try, see how it goes, Run it up the flagpole and see who salutes.

N  intuition, instinct, association, hunch, gut feeling, presentiment, premonition, rule of thumb, superstition, astrology, faith (supposition), sophistry, paralogy, perversion, casuistry, jesuitry, equivocation, evasion, chicane, chicanery, quiddet, quiddity, mystification, special pleading, speciousness, nonsense, word sense, tongue sense, false reasoning, vicious reasoning, circular reasoning, petitio principii, ignoratio elenchi, post hoc ergo propter hoc, non sequitur, ignotum per ignotius, misjudgment, false teaching, sophism, solecism, paralogism, quibble, quirk, elenchus, elench, fallacy, quodlibet, subterfuge, subtlety, quillet, inconsistency, antilogy, a delusion, a mockery, and a snare, claptrap, cant, mere words, lame and impotent conclusion, meshes of sophistry, cobwebs of sophistry, flaw in an argument, weak point, bad case, overrefinement, hairsplitting, intuitive, instinctive, impulsive, independent of reason, anterior to reason, gratuitous, hazarded, unconnected, unreasonable, illogical, false, unsound, invalid, unwarranted, not following, inconsequent, inconsequential, inconsistent, absonous, absonant, unscientific, untenable, inconclusive, incorrect, fallacious, fallible, groundless, unproved, non sequitur, it does not follow, deceptive, sophistical, jesuitical, illusive, illusory, specious, hollow, plausible, ad captandum, evasive, irrelevant, weak, feeble, poor, flimsy, loose, vague, irrational, nonsensical, foolish, frivolous, pettifogging, quibbling, finespun, overrefined, at the end of one's tether, au bout de son latin, intuitively, by intuition, illogically, non constat, that goes for nothing.

algorithmic rule, as a rule, best evidence rule, board rule, carpenter's rule, exclusionary rule, foot rule, gag rule, golden rule, grammatical rule, green thumb, ground rule, hearsay rule, heuristic rule, home rule, lady's thumb, linguistic rule, majority rule, miranda rule, mob rule, morphological rule, naegele's rule, one-man rule, parol evidence rule, phase rule, plumb rule, procrustean rule, rule, rule book, rule in, rule of cy pres, rule of evidence, rule of grammar, rule of law, rule of morphology, rule out, slide rule, thumb, thumb index, thumb through, tom thumb, work to rule, working rule