The husk and stray are counted as sub-variants of existing mobs as opposed to entirely new mobs, hence why you are unable to simply type /summon Stray or /summon Husk. There was supposed to be spawn eggs for them, but it seems they were removed either intentionally or by accident in the final release.
Axiomatic method, in logic, a procedure by which an entire system (e.g., a science) is generated in accordance with specified rules by logical deduction from certain basic propositions (axioms or postulates), which in turn are constructed from a few terms taken as primitive.
Euclidean Geometry. Students are often so challenged by the details of Euclidean geometry that they miss the. rich structure of the subject. We give an overview of a piece of this structure below. We start with the idea of an axiomatic system. An axiomatic system has four parts: undefined terms. axioms (also called postulates) definitions.