In it, facts of the real world are represented by sentences without arguments. A proposition will never be both true and false at the same time. Principles that must always be obeyed: Principle of ...

If the compound statement has two variables (p and q) the truth table must be constructed with 4 rows. If 3 variables (p, q and r), then 8 rows. Two primitive statements are defined as follows, s: ...

Statements - Introduction, sentences and statement, truth value of statement, open sentences, compound statement, quantifier and quantified statements, logical ...