Construct a Complete Truth Table for Each of the Following

question 134

Multiple Choice

Construct a complete truth table for each of the following arguments. Then, using the truth table, determine whether the argument is valid or invalid. If the argument is invalid, choose an option which presents a counterexample. (There may be other counterexamples as well.)
-M ⊃ N
O ⊃ M
∼N
M ⊃ ∼O / M

• A) Valid
• B) Invalid. Counterexample when N and O are true and M is false
• C) Invalid. Counterexample when N is true and O and M are false
• D) Invalid. Counterexample when O is true and N and M are false
• E) Invalid. Counterexample when M, N, and O are false

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Definitions:

Transtheoretical Model

A theory of behavior change that evaluates an individual's readiness to act on a new healthier behavior, and provides strategies or processes to guide the individual.

Contemplation Stage

The stage in which people are aware of a problem and are thinking about overcoming it but have not yet made a commitment to take action.

Action Stage

A phase in the Transtheoretical Model of behavioral change where individuals are actively making modifications to their lifestyle or behavior to overcome a problem.

Consciousness Raising

A process of increasing awareness about social, political, health, or personal issues, often as a component of social movements or personal development strategies.