When writing a scientific or engineering paper, how do we choose between hypothesize and postulate?
When you postulate, you're saying "let's all agree for the purposes of this discussion that (something) is true."
When you hypothesise, you're saying "Let's speculate about what would happen if (something) was true".
A hypothesis has some extra status in scientific discourse, in that scientists frequently put forward hypotheses they consider to be plausible, and perform tests to see whether they stand up to them.
Hypothesis is a theory which can after testing be accepted or rejected. A postulate is something that is assumed to be true without proof. Sometimes postulates are also called axioms.
A hypothesis is a posed statement one wants to prove.
If it has been proved it becomes a theorem.
If it has been disproved it will be discarded.
A postulate is a posed statement one doesn't want to prove.
It is used to derive other statements.
A postulate is like the opening bid for cognition--you suggest to yourself, or your scientific research group, a beginning concept for a range of phenomena with a "let's wait and see what follows from the concept" attitude of openness. Further conceptual development then follows until convergence occurs and testing for alignment with experience can begin.
An hypothesis is the outcome of the postulate, signifying a cognitional convergence and readiness for testing of the convergence with as wide a range of experience as possible.
The Greek word hypo means under. Usage as a prefix in the word hypo-thesis suggests that an hypothesis does not rise to the credibility afforded a thesis of work which has been exhaustively examined for credibility and correctness. An hypothesis may thus be regarded as a collection of inferences and conclusions, deduced as the result of an initial proposal or postulate.