I'm that guy. I don't mean I'm "him", but I'm in a similar position. I'm a guy with an idea that's too big for its own plate. That being, my idea isn't an attractive one or a novel one, it's just a twist on something that might even exist without me knowing it..
Anyway, if you can do it, you have to do it. But as candid and stupid that may sound, I'd make sure that guy knows everything about it, either by telling him up front asap - including why he's not even considered as a partner, or I'd pass the message using anonymous means. Thing is, he'll know sooner than later anyway.
It's well documented that the effect of surprise after the fact can trigger irrational moves, while placing the subject in the observer seat, even as an outsider, might reduce the probability for an irrational act from ever happening.
In any case, it will get legal if you get successful. I'd provision for that. But I'd definitely go ahead without hiding from him.
Anyway, if you can do it, you have to do it. But as candid and stupid that may sound, I'd make sure that guy knows everything about it, either by telling him up front asap - including why he's not even considered as a partner, or I'd pass the message using anonymous means. Thing is, he'll know sooner than later anyway.
It's well documented that the effect of surprise after the fact can trigger irrational moves, while placing the subject in the observer seat, even as an outsider, might reduce the probability for an irrational act from ever happening.
In any case, it will get legal if you get successful. I'd provision for that. But I'd definitely go ahead without hiding from him.