CMSC 250 Lecture Notes - Lecture 1: False Premise
2 Jul 2017
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Cmsc250 lecture 1: prepositional logic: we use lower case letters, letters hold values of 1 (true) or 0 (false, basic operations, conjunction (and, disjunction (or, negation (not) Other operations can be defined in terms of these basic operations. The negation (not: denoted with the symbol ~ The following is a truth table for the negation operator. As we can see, the negation operation changes the value of whatever is inputted into its opposite. It"s probably the easiest of the three operations to remember. The conjunction (and: denoted with the symbol (cid:1512) The following is the truth table for the negation operator. As we can see, only one row (t and t) make the conjunction true. This makes since because both statements have to be true for the conjunction to be true. It is raining today and it is sunny today is a false statement because one of these cannot happen if the other does.
