Concept explainers
(a)
The truth value of the statement “If the tax law has been revised, the deduction is allowed” if the statement “If the deduction is allowed, then the tax law has been revised” is always true.
(b)
The truth value of the statement “If the tax law has not been revised, the deduction is not allowed” if the statement “If the deduction is allowed, then the tax law has been revised” is always true.
(c)
The truth value of the statement “The deduction is allowed only if the tax law has been revised” if the statement “If the deduction is allowed, then the tax law has been revised” is always true.
(d)
The truth value of the statement “The deduction is allowed if the tax law has been revised” if the statement “If the deduction is allowed, then the tax law has been revised” is always true.
(e)
The truth value of the statement “The deduction is allowed or the tax law has been revised” if the statement “If the deduction is allowed, then the tax law has been revised” is always true.
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