Logic operations. these operations refer to those operations that apply the same basic opeation on individual bits of a pattern, or on two corresponding bits in two patterns. 비트레벨 논리동작을 우리가 정의할 수 있다는것을 의미한다네요. A bit can take one of the two values : 0 or 1. 0 : false 1 : true NOT 1 -> 0 0 -> 1 AND (both digits should 1 -> true) 0 & 0 -> 0 0 & 1 -> 0 1 & 0 -> 0 1 & 1 -> 1 OR (if 1 exists -> true) ..