[sudomake]

I've heard that no one attempts suicide twice, but guns make it more likely that their first attempt succeeds

[minikites]

That is also correct:

>And for those who did not die, it's likely they would not try to commit suicide again. A 2002 review of 90 studies indicates that more than 90 percent of people who survive a suicide attempt won’t die from a later suicide attempt either.

[tafycent]

The way that's worded makes it sound like they will go on to try again, but are very likely to fail again. It makes sense that that would be the case, but I don't think it's the point you're trying to make.

[DanBC]

> I've heard that no one attempts suicide twice

Lots of people attempt suicide more than once, and many of them die by suicide when they try again.