Right, and I’d argue that in deterministic view the impact of knowledge is already factored in. It becomes just one of the variables that the mindstate is composed of.

I think that a slightly more interesting argument is that the universe may be deterministic, but it is impossible to compute its state from within the system itself. Therefore, for any observer within the system it is impossible to predict the future state of the system deterministically. This would mean that for all practical intents and purposes we have to default to having free will.