But you do have processes in DT. They're just theoretical ones, for lack of a better word.

You will need to supply the better wordsin order to persuade me that there are processes in dust theory.

It means a process that isnt disturbed too much by other processes. For instance, if you drop a feather, its path is disturbed by small air currents, if you drop a rock its path isnt.

I really don't understand how this is an argument against Dust Theory.

It wasn't intended as an argument against DT, it was intended an argument that the notion of stability is easy to cash out given not-DT.

What do you think Dust Theory is?

Its a family of ideas.

Centrally , the idea that mental states superevene on instantaneous physical or computational states, rather than computational or physical processes.

Peripherally, the ideas that there are no:-

Computational processes

Causal processes

Temporal sequences

Essences of selfhood that can vary independently of mental state.