<blockquote><b>Betteridge's law of headlines</b> is an <a title="Adage" href="https://en.m.wikipedia.org/wiki/Adage">adage</a> that states: "Any <a title="Headline" href="https://en.m.wikipedia.org/wiki/Headline">headline</a> that ends in a <a title="Question mark" href="https://en.m.wikipedia.org/wiki/Question_mark">question mark</a> can be answered by the word <i>no</i>." It is named after Ian Betteridge, a British technology journalist,</blockquote>

but 5 years before – Andrew Marr wrote

If the headline asks a question, try answering ‘no’. Is This the True Face of Britain’s Young? (Sensible reader: No.) Have We Found the Cure for AIDS? (No; or you wouldn’t have put the question mark in.) Does This Map Provide the Key for Peace? (Probably not.) A headline with a question mark at the end means, in the vast majority of cases, that the story is tendentious or over-sold. It is often a scare story, or an attempt to elevate some run-of-the-mill piece of reporting into a national controversy and, preferably, a national panic. To a busy journalist hunting for real information a question mark means ‘don’t bother reading this bit’

So … why is it called Betteridge’s Law ?

[ Source : Betteridge’s law of headlines – Wikipedia ]