Betteridge's law of headlines is an adage that states, "Any headline which ends in a question mark can be answered by the word no."
https://en.wikipedia.org/wiki/Betteridge%27s_law_of_headline...
https://en.wikipedia.org/wiki/Betteridge%27s_law_of_headline...
If a journalist publishes a story titled "Do police investigate crime?", the answer is obviously wouldn't be "no."
I don't think mentioning the law itself adds much to the conversation—certainly not the "can be answered by the word no" part.