Logic: The Theory of Formal Inference by Alice Ambrose Morris Lazerowitz

Author:Alice Ambrose, Morris Lazerowitz
Language: eng
Format: epub
Publisher: Dover Publications
Published: 1989-11-22T05:00:00+00:00

FIGURE 3.

The third conclusion is justified by F2:

For example, given that there are swans that are black, we may conclude that not everything is such that if it is a swan it is not black.

FIGURE 4.

The third conclusion is justified by F2:

For example given that some dogs are not terriers, we may conclude that not everything which is a dog is a terrier.

FIGURE 5.

The second conclusion is justified by F1:

For example, given that all men are mortal, we may conclude that there is nothing which is both immortal and a man.

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