You've learned boolean logic. You understand true and false, the AND, OR, NOT, and XOR operators, truth tables, and how to combine operators in complex expressions.
You know De Morgan's Laws for negating complex conditions. You've seen how boolean logic drives conditionals, loops, and bitwise operations. You solved problems using XOR cancellation, in-place boolean marking, and bit pattern checks.
Boolean logic is the foundation of programming. Every decision your code makes uses these operators. Now you can write conditions confidently and debug expressions that seemed confusing before. Good job.