Examlex
Having eight valence electrons is very stable and is called an octet.
One-story House
A residential structure featuring all of its living spaces on a single level, without any stairs leading to additional floors.
Not (p And Q)
A logical operation that negates the conjunction of two propositions; true only when either P is false, Q is false, or both are false.
Compound Proposition
A statement formed by combining two or more propositions with a logical operator, such as "and," "or," or "not."
Contrapositions
Logical relationships between statements where the antecedent of one is the negation of the consequent of the other, and vice versa.
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