Are you a goldfish by any chance?..... OOOoo forget it here it is:
S: The question was "how can matter confuse things".
A: You assume perfect perception, which is 'quite wrong'.
S: Well, I assume mechanisms have mechanistic results.
A: That is something different. From one POV one can only gain a limited amount of data, then it is up to experiences and learned logic to fill in the gaps.And these don't need to match to the truth.
S: So some mechanistic results of the mechanisms of my brain dont have to match to the "truth", but other mechanistic results of the mechanisms of my brain do have to match to the "truth"? Do I have that right?
A: Of course, if the input (senses) or the reference data (experiences) is wrong or unclear, then the output can be wrong.
S: How would something material ever be wrong? How does the chain of causality among physical things ever amount to being "wrong"?
A: person greets you and asks if he can come in to your home, you say yes. However you couldn't have seen that he has a gun on his back, he then shoots you and steals your money. You in this example was wrong in your assessment, this assessment was based upon what you could see and your experiences with others, both of which are limited.
S: How was this an example of "wrong"? Material stuff did stuff, then some material stuff went through some other stuff, and there is a bunch of stuff left. The same stuff that was there before, just rearranged. Explain where the "wrong" comes in.
A: If it was right/perfect you wouldn't have been shot. It makes it clear that material processes may get a wrong interpretation of the situation.
S: What material process went "wrong"?
A: The matter worked as it should but the conclusion still didn't match reality, and that is the anwser to the question.
S: So matter can be wrong about a conclusion?
Yes, a person/brain (matter) can be wrong/confused even it fully obeys materialism.
Do you mean that you are not aware of the empirical support for relativity as opposed to newtonian mechanics?
There is no contradiction, they are two parts of the same piece.