The circularity of materialism is well expressed in this quote:
“Physics explains everything, which we know because anything physics cannot explain does not exist, which we know because whatever exists must be explicable by physics, which we know because physics explains everything… There is something here of the mystical.”
-David Bentley Hart (Christian academic/theologian)
Atheists laugh at Christians who try to prove the truth of Christianity by solely citing the Bible. This is nothing other than circular reasoning, the atheists argue.
But what about the materialists?
To point to the truth of science, all they do is cite more science or make arguments to authority, e.g., “All scientists agree that science is the only way to understand the world!”
The irony is lost on them.