I once saw a study that concluded heterosexual couples were more likely to have children than homosexual couples. I mean, there's the things we know, and then

I once saw a study that concluded heterosexual couples were more likely to have children than homosexual couples. I mean, there's the things we know, and then there's the things that have been scientifically studied and validated. And then there's the things that really don't need to be validated. I once had someone claim that if you drove a vehicle through mud, it would get muddy. But since it hasn't been scientifically proven and validated, do I really "know" that to be true? Is this really going to be an existential crisis where we don't really know anything until science tells us it's true?