Those are not postulates; they are statements.
The Difference
* Postulates are foundational assumptions in logic or mathematics accepted without proof. They are starting points for building theories.
* Statements are assertions that can be true or false and do not carry the same foundational weight.
Examples
* “All cats walk on four legs” is a generalization, not a postulate.
* “The sun is a hot ball of gas” is a scientific fact based on evidence.
* “Mammals are animals that produce milk and have hair” is a definition, not a postulate.
True postulates include Euclid’s geometric postulates or the axiom of choice in set theory.