TAE ahead of schedule on billion-degree hydrogen-boron fusion

No it produces three alpha particles, isn’t this fission?

I like the idea of this, but I’m still trying to understand how it can be called fusion.

I’m not being pedantic, I’m assuming there’s a really good reason for this, I might have missed it when I was in nuclear physics lectures.

But fusion is energy positive up to iron, wouldn’t fission be energy negative up to iron too?