One of the core laws of logic is the law of non-contradiction, which says something cannot be both “A” and “non-A” at the same time and in the same sense.
Moja ya sheria ya msingi ya mantiki ni sheria ya mashirika yasiyo ya utata, ambayo inasema kitu hakiwezi kuwa "A" na "kisiwe- A" wakati huo huo na kwa maana hiyo.