Geach, Peter

"The law of excluded middle holds in all domains of being."

"Propositions have logical structure that cannot be eliminated."

"The mind grasps reality through the understanding of universals."

"To analyze a concept is to specify its correct usage."

"The problem of intentionality concerns the aboutness of thoughts."

"Reality has a determinate structure independent of human cognition."

"The analogy between thought and language is more complex than it appears."

"To deny abstract objects is to adopt an impoverished ontology."

"The notion of a substance sortal is crucial to metaphysics."

"Language can be reformed only through philosophical understanding."

"The principle of contradiction is the foundation of all reasoning."

"We must respect the platonic realm of abstract entities."

"To assert a sentence is to express one's belief in its truth."

"The problem of individuation requires us to appeal to substrates."

"Logical necessity is real necessity, not mere psychological compulsion."

"The meaning of a word is determined by its role in a language system."

"Being admits of gradation but not of relativity."

"The analysis of causation requires both logic and metaphysics."

"To understand objects is to understand their essential properties."

"The problem of change shows that being must be understood dynamically."

"Medieval philosophy deserves study for its own merit, not merely historical interest."

"The verb is the soul of the proposition."

"To deny universals is to cut oneself off from objective knowledge."

"The structure of discourse reflects the structure of thought."

"Reality is not constructed by the mind but disclosed to it."

"The notion of a natural kind requires real universals."

"The fundamental principle of logic is that contradictions cannot both be true."

"A thing is what it is; to say it is what it is not involves a logical absurdity."

"Language games show us that meaning is not fixed but depends on use and context."

"We must distinguish between what a sentence means and what a speaker means by it."