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Definition of Unprovable
1. Adjective. Not provable. "It was both unproved and unprovable" 
Similar to: Unobvious
Definition of Unprovable
1. provable [adj] - See also: provable
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1. Adjective. Not provable. "It was both unproved and unprovable" 
1. provable [adj] - See also: provable