untestable

Cannot be checked

Untestable describes something that cannot be tested or verified through observation, experiment, or evidence.

The term appears most often in scientific and philosophical contexts, where an untestable hypothesis or claim is one that offers no way to prove or disprove it.

The theory was dismissed as untestable.

Critics sometimes use untestable to challenge ideas they consider unscientific or unfalsifiable.

immeasurable

unquantifiable

Cannot be numerically expressed

unfalsifiable · unprovable · non-empirical · subjective · intangible · abstract · indefinite · indeterminate · incalculable · boundless

uncertain

unverifiable

Cannot be proven

doubtful · speculative · inconclusive · indeterminate · ambiguous · unclear · tentative · hypothetical · conjectural · assumptive

scientific

hypothesis

Testable proposed explanation

postulate · assumption · unfalsifiable · anecdotal · uncontrolled · unobservable · unmeasurable · pseudoscientific · speculative · theoretical

philosophical

metaphysical

Beyond the material realm

transcendent · solipsistic · epistemological · unfalsifiable · axiomatic · a priori · ineffable · numinous · sublime · absolute

Opposites
verifiability

untestabletestable

Able to be examined

verifiable · provable · demonstrable · confirmable · checkable

scientific methodology

untestablefalsifiable

Capable of being disproven

scientific · empirical · evidence-based · reproducible · replicable

Family

test, protest, contest, tested, testing, detest, tester, untested, attest

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Used worldwide · Timeless · Abstract · Rated G