As with anything else, the best way to look at things when you're unsure if someone is right or they are lying: imagine four scenarios:

1. It's true and you believed/supported them

2. It's true and you didn't support them

3. It's a lie and you believed/supported them

4. It's a lie and you didn't support them

Now for each of these think of the worst-case scenario. Find out which one is the _worst case_ scenario and...and this is really important...do not, by any means, support that scenario/option.

In this example: I think we can all say that the worst scenario, however improbable it seems (it's still probable), is that AI takes over the world and kills us all. So just like with the climate change, let's do the bare minimum to prevent that. If we're wrong and, as many commenters wrote here, we still block further development of AI, the worst that will happen is that some companies will catch up. Wow. Really? To me this is a no brainer. On one hand we're risking humanity and on the other hand someone makes some money or saves their company from being late to the AI race. It's like comparing if you'd rather eat literal poo or have someone else eat two apples.