1.Telling TRUE to something TRUE is a TRUE action.
Mathematical formula:
- x + = +
2.Saying TRUE to something WRONG, or otherwise saying WRONG to something TRUE is a WRONG action.
Mathematical formula:
- x - = -
- x + = -
3.Saying WRONG to something WRONG is a TRUE action.
Mathematical formula:
- x - = +
The math lesson is full of meaning, which we can take as a life lesson.