Comment by roryirvine

To be "mere puff", the claim needs to be so obviously untrue that no reasonable bystander would suppose it to be meant literally.

But Musk often acts as if he does actually intend to be taken seriously. In the case of the current story, consider the marketing resources Tesla have poured into their previous "Battery Day" events and look at the press reaction; it's clear that at least some people believed that the claims stacked up.

A quick search of the hn archives for "4680" shows a similar picture. Yes, there were always some sceptical voices, but they were often shouted down as being from people motivated by an anti-Elon grudge. Nevertheless, the sentiment tended to be overwhelmingly positive with many posters actively reinforcing the hype.

Now, whether or not a self-selecting sample of hn posters can be seen as "reasonable bystanders" is certainly debatable - but it does seem that we're getting close to the point where Musk is going to have to start branding those who believe him as being exceptionally gullible in order to escape a charge of misleading advertising.