Theorem bamalip 2574

Description: "Bamalip", one of the syllogisms of Aristotelian logic. All 𝜑 is 𝜓, all 𝜓 is 𝜒, and 𝜑 exist, therefore some 𝜒 is 𝜑. (In Aristotelian notation, AAI-4: PaM and MaS therefore SiP.) Like barbari 2555. (Contributed by David A. Wheeler, 28-Aug-2016.)

Hypotheses

Ref	Expression
bamalip.maj	⊢ ∀𝑥(𝜑 → 𝜓)
bamalip.min	⊢ ∀𝑥(𝜓 → 𝜒)
bamalip.e	⊢ ∃𝑥𝜑

Assertion

Ref	Expression
bamalip	⊢ ∃𝑥(𝜒 ∧ 𝜑)

Proof of Theorem bamalip

Step	Hyp	Ref	Expression
1		bamalip.e	. 2 ⊢ ∃𝑥𝜑
2		bamalip.maj	. . . . 5 ⊢ ∀𝑥(𝜑 → 𝜓)
3	2	spi 2042	. . . 4 ⊢ (𝜑 → 𝜓)
4		bamalip.min	. . . . 5 ⊢ ∀𝑥(𝜓 → 𝜒)
5	4	spi 2042	. . . 4 ⊢ (𝜓 → 𝜒)
6	3, 5	syl 17	. . 3 ⊢ (𝜑 → 𝜒)
7	6	ancri 573	. 2 ⊢ (𝜑 → (𝜒 ∧ 𝜑))
8	1, 7	eximii 1754	1 ⊢ ∃𝑥(𝜒 ∧ 𝜑)

Syntax hints:   → wi 4   ∧ wa 383  ∀wal 1473  ∃wex 1695

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-12 2034

This theorem depends on definitions:  df-bi 196  df-an 385  df-ex 1696

This theorem is referenced by: (None)