What type of inductive reasoning is the following argument? The author of the textbook states that Plato started a university, so he did.

The type of inductive reasoning used in the argument is Reasoning by authority. Because what the Author of the textook stood is used as evidence for the conclusion of the argument, which is that Plato did start a university.

In other words, the evidence that Plato actually started a university is the statment mentioned by the author of the textbook mentioned. If the author says that this fact happened, then is true and inductively valid.