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Unassailable vs Indubitable - What's the difference?

unassailable | indubitable |

As adjectives the difference between unassailable and indubitable

is that unassailable is secure against attack; impregnable while indubitable is clearly true; providing no possibility of doubt.

As a noun indubitable is

that which is indubitable.

unassailable

English

Adjective

(-)
  • secure against attack; impregnable
  • (by extension) undeniable, incontestable or incontrovertible
    • She won the debate with her unassailable logic.

    indubitable

    English

    Adjective

    (en adjective)
  • clearly true; providing no possibility of doubt.
    • The indubitable effect of the potion convinced many unbelievers.

    Synonyms

    * undoubtable

    Derived terms

    * indubitably

    Noun

    (en noun)
  • That which is indubitable.
    • If we build logically upwards from a few indubitables , the whole system must remain correct.