Suddenly, Alex Jones and his conspiracy theory InfoWars brand have been wiped from just about every online platform.

It seemed that Facebook, YouTube and Spotify all hummed and hawed for days and then breathed a sigh of relief once Apple acted to remove the man who promoted the idea that the Sandy Hook school massacre had been a hoax.

But that leaves Twitter as the one big social media megaphone for Mr Jones.

In a series of tweets, the chief executive, Jack Dorsey, explained the lack of action.

First, he said: “We didn’t suspend Alex Jones or InfoWars yesterday. We know that’s hard for many but the reason is simple – he hasn’t violated our rules. We’ll enforce if he does. And we’ll continue to promote a healthy conversational environment by ensuring tweets aren’t artificially amplified.”

Now, it appears that Alex Jones is more cautious on Twitter than elsewhere so may well have stayed within the social network’s rules.

But what was really striking was what Jack Dorsey and the Twitter Safety team went on to say about the general principles regarding fake news and conspiracy theories on the platform.

Here’s what Twitter Safety said: “As we have stated publicly, we strongly believe Twitter should not be the arbiter of truth nor do we have scalable solutions to determine and action what’s true or false.”