unobservable

Cannot be seen

Unobservable describes something that cannot be seen or detected, either in principle or with available methods.

In philosophy and science, unobservable entities—like electrons, dark matter, or other minds—are inferred from effects rather than directly perceived: The theory posits unobservable particles to explain the results.

The word often surfaces in debates about what science can legitimately claim to know.

philosophical

metaphysics

Philosophy of existence's nature

existence · being · reality · phenomenon · transcendent · abstraction · objectivity · subjectivity · consciousness · mind

scientific

hypothesis

Testable proposed explanation

model · inference · deduction · prediction · dark matter · dark energy · quantum · subatomic · neutrino · black hole

hidden

concealed

Made invisible deliberately

covert · clandestine · secret · undisclosed · unseen · unnoticed · obscured · latent · undiscovered · elusive

mental

thought

Mental concept or reflection

intuition · imagination · insight · intention · motive · desire · memory · dream · subconscious · unconscious

Categories
Opposites
perceptibility

unobservableobservable

Capable of being detected

perceptible · detectable · perceivable · discernible · noticeable

measurability

unobservablemeasurable

Able to be gauged

quantifiable · empirical · verifiable · testable · recordable

visibility/hiddenness

unobservablevisible

Able to be seen

exposed · overt · conspicuous · evident · apparent

Family

observe, observer, observant, observation, observed, observing, observance, observable, observers

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