That's right, his theories are too insane.

Personally, I prefer a different approach to the matter, good old realism, logic and common sense, these are my tools.

As far as we know, Sage does not know her biological parents.

The little information she has about her allegedly antisocial mother may be wrong.

It could be a deliberate lie by Jade, to prevent Sage from being too eager to find her biological parents.

We have several facts about Sage, based on which we can build a logical structure of the theory.

We know that Sage achieved the status of the president of the sorority.

This speaks to her goal-oriented character, which she could have inherited from her biological parents.

Sage masterfully made a mutually beneficial deal with the jocks.

It means she's a master at making deals. Great deals, profitable deals, wonderful deals.

And most importantly, Sage is a redhead.

Based on these indisputable facts, we can assume with a high degree of probability that Sage's parents are also very successful, occupy a high position in the social hierarchy, and one of her parents is also a redhead.

The conclusion is clear: she is the daughter of the President of the United States.