What's "discovered by reason" mean?

Native speaker’s answer
Rebecca
Here, I believe the speaker says "discovered by reason" to mean "discovered/figured out by reasoning/logic." If we consider the context (the speaker is talking about astrology, divine intervention/religion or similar things," so we can assume "discovered by reason" to be a different way of understanding the world. "Reason" is often used as a synony for "logic." Ex: It can't be understood by logic or reason. It's a supernatural phenomenon. Ex: John is a stubborn man. It's hard to persuade him with reason.