Learning by Thinking

We understand a topic well when we can explain it to someone else who's not familiar with it and cannot provide feedback and give us additional insights. Because we're forced to make sense of it for it to make sense to them. But we don't need to have someone else to talk with to make it work. Thinking things through is a good exercise to experiment. In other words, we learn by thinking. Galileo used what we call thought experiments to formulate his heliocentric theory, which holds that Earth moves around the Sun at great speed. Galileo demonstrated that falling objects must fall at the same rate regardless of their masses by sharing logical reasoning. In Discorsi e Dimostrazioni Matematiche (discourses and mathematical demonstrations), Galileo says: Salviati. If then we take two bodies whose natural speeds are different, it is clear that on uniting the two, the more rapid one...

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