atheism, philosophy and emotional immaturity

[Tex]

First hit:

Argument from authority (argumentum ad verecundiam), also authoritative argument and appeal to authority, is an inductive-reasoning argument that often takes the form of a statistical syllogism. Although certain classes of argument from authority can constitute strong inductive arguments, the appeal to authority is often applied fallaciously: either the authority is not a subject-matter expert, or there is no consensus among experts in the subject matter, or both.

When you cited a chemist's rejection of evolution as evidence that evolution was false (at least I think that is what it was about) it was fallacious because the chemist was not a subject-matter expert.

Perfect.

The only way to argue by authority is use God. When your audience doesn't believe in God, you can't use authority.