What is the obverse of the proposition "Some chemicals are not toxic substances"?
A) Some chemicals are nontoxic substances.
B) Some toxic substances are non-chemicals.
C) No toxic substance is a non-chemical.
D) No chemical is a nontoxic substance.
E) All nontoxic substances are chemicals.
Correct Answer:
Verified
Q184: Which propositions are equivalent to their contrapositives?
A)A
Q185: What is the obverse of the proposition
Q186: What is the obverse of the proposition
Q187: What is the converse of the proposition
Q188: What is the converse of the proposition
Q190: The obverse of a proposition is formed
Q191: The complement of a term refers to:
A)the
Q192: What is the obverse of the proposition
Q193: Which propositions are equivalent to their converses?
A)A
Q194: What is the complement of thin?
A)non-thin
B)thinner
C)fat
D)slender
E)of average
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