Definition of proof positive in English:

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proof positive


Evidence taken to be final or absolute proof of the existence of something: he still needs proof positive of her love
More example sentences
  • The final four that battled it out in the conference finals were proof positive.
  • Isn't the fact that prices came down after the big sell-offs proof positive that the change of ownership was crucial?
  • When the going got tough they organised a grassroots protest to stop the worst happening - proof positive that when people are given opportunities, they very often make the most of them.
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