1.4ex IV
Proofs by Example

Drag groups of sentences from the right and use them as examples to prove the statements on the left. (Place them inside the empty, white boxes.)
Two false sentences can be logically equivalent.
Proof by example:
It's false to claim that two logically indeterminate sentences must be logically equivalent.
Proof by example:

A valid argument may have logically indeterminate pemises and conclusion.
Proof by example:

Not all valid arguments have logically indeterminate conclusions.
Proof by example:

Lieberman or McCane won the 2000 presidential election.

Either McCaine or Lieberman won the presidential election of 2000.

Lieberman or McCane will win the 2004 presidential election.

Nader or Gore will win the 2004 presidential election.

Neither Nader nor Buchanan will win the 2004 presidential election.
Alan Keyes will also not win this election.
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Neither Nader nor Keyes will win.

Either Gore or Bush will win the 2004 presidential election.
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Gore will win or he won't