Distribution of Subject Terms

The subject term is distributed if the proposition is universal (A or E) and undistributed if the proposition is particular (I or O).

A statement about all Ss obviously makes a claim about the whole class, so S in this case is distributed. Just as obviously, a statement about some Ss does not make such a claim, so S in this second case is undistributed.

Similarly, "No S is P" says something about the entire class of Ss, so that the subject is distributed. "Some S are not P" does not cover all the Ss, so the subject there is undistributed.

For the subject term, what matters is quantity. Quality is irrelevant.

Distribution of predicate terms


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