proof positive
idiomPart ofproof
proof positive — idiom
1. clear, absolute, and undeniable evidence that settles a question beyond any doub
1.idiom
Definition
clear, absolute, and undeniable evidence that settles a question beyond any doubt.
Example
The CCTV footage was proof positive that the suspect had been near the building at midnight.
Her first-place finish in the race was proof positive that months of hard training had paid off.