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Unit 2 of 18
Logic and Proof
Mathematics as justified reasoning.
Every topic follows the curriculum standard
Learn→See→Try→Explain→Verify→Challenge→Transfer→Master
Topics in this unit
4 topics. Each card opens a full topic workspace and supports all eight learning actions.
Deductive Reasoning
From assumptions to conclusions
Direct Proofs
The two-column and paragraph forms
Indirect Proofs
Contradiction and contrapositive
Three-pathway connections
Study this unit at three depths — current-grade mastery, advanced thinking, and competition mathematics.