Capable of being averred; able to be asserted or declared as true.
From 'aver' (to assert as true) from Latin 'averare,' plus English '-able' suffix. The word appears in legal and formal contexts when discussing whether a claim can be legally stated or defended.
In medieval law, whether something was 'averrable' determined if you could even make your case in court—it separated provable facts from hearsay and wild accusations!
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