Musket
I reckon it may be that he is fed up of people speaking of superstition as if it is a form of scientific discovery.

Which is why it is important to make it clear what science is, what lies at its core - the scientific method. Steve rejects this completely - " I have no time for your displays of philosophical musings over the meaning of science.". He thinks it is simply a matter of accumulating evidence but without the underlying philosophy, evidence is meaningless or can mean whatever you want it to.