indemonstrable

Meanings

1. 1
   adj

   incapable of being demonstrated, proved, or established by an argument

   The system begins from an indemonstrable principle accepted as axiomatic.

2. 2
   noun

   logic: a proposition accepted without demonstration, especially an axiom or primitive principle

   The treatise reduces its assumptions to a small set of indemonstrables.

From in- ("not") + demonstrable, ultimately from Latin demonstrare ("to point out, show, prove"). As a noun in logic, an indemonstrable is a starting proposition not proved from earlier premises.

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