If Only One Disjunct of a Disjunction Is a Tautology

question 71

Multiple Choice

If only one disjunct of a disjunction is a tautology, then the disjunction itself is a:

• A)tautology
• B)self-contradiction
• C)contingency
• D)coherency
• E)unable to determine from the information given

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Definitions:

Cation

A particle with one or more units of positive charge, such as a hydrogen ion (H+) or calcium ion (Ca2+). Compare with anion.

Anion

A particle with one or more units of negative charge, such as a chloride ion (Cl-) or hydroxide ion (OH-). Compare with cation.

Isotopes

Atoms of the same element that differ in the number of neutrons within their nuclei.

Ions

Atoms or molecules that have gained or lost one or more electrons, thus acquiring a charge.