The conditions are appropriately pretty broad. If I find someone in my home, I'm not going to politely ask that person's intentions. It's pretty safe to assume they're up to no good, and it's generally legal to defend your home using whatever means are necessary. 

I've never been in such a situation. I'd like to think I wouldn't simply shoot someone on sight. I would, however, be forced to make a quick decision regarding the intruder's intent, so generalization would be appropriate.