There is no double standard. If patio11 were insinuating that you were a liar, I'd ask him to come right out and say it as well. Skepticism/critical discussion is no cover for rhetorical techniques that amount to trolling.

So 1) stop insinuating he is a liar or 2) make it more concrete. Do you think he is a liar and if so what do you think he is lying about and why? What would it take to make you stop spreading said accusation?

That would be a skeptical argument that could be critically discussed. As it stands, your position is "in the face of lots of evidence that patio11 has produced that indicates he usually writes the truth, I refuse believe him about this specific thing for reasons I will not outline."

I for one believe him because of his long track record of writing things that are verifiable and my own experience as a consumer of consultant products.