NS,
So the evidence shows it's a non purposive world because you say that it is and you call something knowledge because you believe it
No, I call it "knowledge" because I believe it to be true BUT on the basis of the justifications I have for it. And guess what – so do you, which is why you believe yourself to have knowledge about the cause of gravity that does not include pixies. Do you think that's knowledge just because you say it is too? Why not?
The trick you seem to be trying here is to rely on the impossibility of "evidence" for the non-existence of something (invisible elephants, black swans, gravity pixies, purposive world, whatever) to critique a claim to knowledge about the absence of these things. Outside of pure logic that doesn't work though because we have to live in the real world in which the word "knowledge" needs to
mean something. There is literally no claim to knowledge about anything at all that you couldn't counter with, "but how do you know it's not supernatural X instead?" so as a pragmatic matter it's legitimate to call, say, warped spacetime causing gravity and pixies not causing gravity "knowledge".
As I think I said to you a while back, "knowledge" doesn't imply certainty. If ever someone produces a picture of, say, a pixie holding something down with string then I'd be forced to accept that my previous claim of knowledge about that was wrong, and I'd have a new claim of knowledge instead.
Why do you keep avoiding the problem that you actually agree with this - you think your belief in warped spacetime causing gravity is just as much knowledge for you as I think it is for me, so why not ask yourself the same questions about that belief that you keep asking me?