LessonsThe First Figure: Conditions of Validity and Four Productive MoodsQuiz

كل ج ب، وكل ب د، ينتج كل ج د.
All C are B, and all B are D; therefore all C are D.

Both premises are universal affirmatives. The first places every C within B; the second places every B within D.

Consequently no C falls outside the scope of D, and the conclusion is also universal affirmative. This is the AAA form.

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Mood 1: the textbook example

The First Figure: Conditions of Validity and Four Productive Moods

كل ج ب، وكل ب د، ينتج كل ج د.
All C are B, and all B are D; therefore all C are D.

Both premises are universal affirmatives. The first places every C within B; the second places every B within D.

Consequently no C falls outside the scope of D, and the conclusion is also universal affirmative. This is the AAA form.