The phrase "a tangible proof" is not correct in standard English; it should be "tangible proof" without the article "a." You can use "tangible proof" when referring to evidence that can be physically perceived or touched, demonstrating the truth of a claim or assertion.
Example: "The scientist presented tangible proof of her theory through a series of experiments that yielded consistent results."
Alternatives: "concrete evidence" or "physical evidence."
"We have not been given any tangible proof to say that he is definitely a Pakistani.
For more technical details about their security you can refer to Telegram's site, but as a more tangible proof of the app's security for us non-specialists, the app's makers also set up a competition.
A dividend is tangible proof that the company you have invested in is rewarding you for holding the shares.
Then came a bit more tangible proof: the dot-com bubble, quickly followed by the housing bubble.
Mariella replies Perhaps you are! Thank you for providing a sliver of tangible proof to back up my specious theory that the devil you know can occasionally reinvent himself.
Jorge sees what unfolded at Santa Ana in a different light as tangible proof that activists can resist the proposed expansion of the immigration detention complex.
In explaining to the audience what birth registration is, the Prime Minister highlighted that, "a birth certificate is the most tangible proof that a Government legally recognizes a child as a Member of society" and that a child who is not registered at birth is invisible in the eyes of the authorities".
He added: "'Roman Holiday' was tangible proof of a friendship, a symbol on celluloid of many friendships, and the manifestation of a pact between friends during a time of political persecution".
Despite the fact that most of us who venture into the world wide web on a daily basis wouldn't bat a desensitised eyelid at "Dirty Cumsluts IV: Grandma Gets Horny" getting advertised in the corner of our smartphone screens, we know that tangible proof a female MP once showed her nips in public is enough to embarrass her out of politics for ever.
