why TRUE

A ↓ B
B ↓ C
inference logicC ↓ A
0

Truth check table

CaseABCA ↓ BB ↓ CC ↓ A
1TTTFFF
2TTFFFF
3TFTFFF
4TFFFTF
5FTTFFF
6FTFFFT
7FFTTFF
8FFFTTT
Public: Yes; Show truth table: Yes;