What is the difference between the bottom logic and the top logic?

The underlying logic is the basic method, just like the molecules that make up matter. Every substance is made up of molecules, so everything needs to be thought according to the underlying logic.

Top-level logic is the top-level consciousness, and it is a unique concept formed by a series of choices and their results. It helps you classify things, then face it, understand it, solve it and admit it.

Logical tree thinking

Logical tree thinking is also grouping and classification thinking. Common structures include topic tree, hypothesis tree, whether tree, etc. Logical tree is the most commonly used scenario of MECE rules.

For a problem, we can build a topic tree with mind map according to the conclusion (or hypothesis), viewpoint and argument of the topic, and decompose it from trunk, branches, branches and leaves in turn to make the final leaves. This is our argument. As long as the arguments are sufficient, the assumptions or conclusions in this question are correct.

Logical tree is a practical problem diagnosis framework, and it is also a very good tool to sort out the scheme display ideas and typesetting strategies.