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Yes
Yes, contrapositives are always true, as long as the original statement stood true.
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This is not always true.
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No.
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No.
An example of a conditional statement is: If I throw this ball into the air, it will come down.In "if A then B", A is the antecedent, and B is the consequent.
No. Consider the statement "If I'm alive, then I'm not dead." That statement is true. The converse is "If I'm not dead, then I'm alive.", which is also true.
a tautology is a statement that is always true. For example p or not p is always true because one of the two is always true.
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Yes
The statement "not P" is the negation of statement P. It means the opposite of P is true. For example, if P is "The sky is blue," then not P would be "The sky is not blue."
Objects will always be pulled to the center of the mass.