What evidence does the author provide?

Synthesized answer

The provided passages do not contain information about the evidence the author provides. They only offer the title of the work, the author's name, and the subject categories [1]. Therefore, the specific evidence used by the author in "Abstract Objects: An Introduction to Axiomatic Metaphysics" cannot be determined from these passages.

Synthesized from the book passages below. Chat with the book on Feynman for follow-up.