How do you deal with a developer that constantly challenges your propositions in a rhetorical matter?

For example, say if we have a problem and I propose solution A (along with my reasons why), the developer would then shoot it down - not with another alternative solution or exploration path but instead a rhetorical question.

It has gotten *exhausting* working with this person because every interaction becomes almost a debate. This isn’t just particularly with development but even during casual discussions.

I’ve even tried asking “so what would you suggest?” in which they would answer with confidence in a rhetorical matter - but without any concrete decision making (but at the same time sounding like they did make one).

We work in a team and nobody has taken the reigns of leadership (he’s quiet most meetings), so I decided to take initiative and make the calls. All of a sudden, he has a voice that is mostly axed towards being argumentative than productive. It has come to a point where I’ve just stopped making propositions because I’ve become exhausted trying to defend myself and literally repeating something like 4-5 times, however this is a project that needs to be delivered and because we work closely together, I can’t just ignore him and do my own thing.