Final answer:
To postulate; when you do it, you make the first 3 letters out of the last 3 is a) Speculate.
Step-by-step explanation:
To postulate means to suggest or assume the existence, truth, or validity of something without sufficient evidence. When you speculate, you make assumptions or guesses without solid evidence or proof. Speculation involves considering possibilities or potential outcomes based on incomplete information.
For example, if someone were to postulate that aliens exist on another planet without any concrete evidence, they would be speculating about the existence of extraterrestrial life. Therefore the correct answer is a) Speculate.