When you say something is both red and invisible, you are exaggerating for the purpose of mocking and, at the same time, being worthy of mocking yourself. And the question wasn't serious. A serious question would have been less concerned with the outward form of the force, and more concerned with its nature.
And if Einstein couldn't put his finger on its nature in a quantifiable manner, I don't know why you think I could. All I know is what I know, and with your heart and mind closed the way it is, you would put everything I know down to coincidence. As is your right.
But it doesn't change the fact that I know what I know, and it leads me to believe what I believe. And the benefit that I derive from this is something I treasure. If you don't need it, disdain it. That's what liberty is all about. But don't expect me to call your mockery 'rational discourse' just because you do, even if you think you're not lying when you do it.