Question

Question Number 1. Express the following statements symbolically. Use letters that stand for non-negated statements, and indicated what the letters represent.

a) If global warming continues and Congress does not act, preventive measures will be needed or some coastal areas will eventually flood.

b) Not having feathers is necessary for being human.

Question Number 2. Write the following argument in symbolic form, choosing simple statements that are not negated. (Say what each letter represents).

If I am at the beach, I swim.

If I swim, I feel refreshed.

Therefore, if I am not at the beach, I do not feel refreshed.

Use truth-table techniques to decide whether the argument is valid.

Answer 1

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