Theorem mdandyvrx15

Description: Given the exclusivities set in the hypotheses, there exist a proof where ch, th, ta, et exclude ze, si accordingly. (Contributed by Jarvin Udandy, 7-Sep-2016)

	Ref	Expression
Hypotheses	mdandyvrx15.1	⊢ ( 𝜑 ⊻ 𝜁 )
	mdandyvrx15.2	⊢ ( 𝜓 ⊻ 𝜎 )
	mdandyvrx15.3	⊢ ( 𝜒 ↔ 𝜓 )
	mdandyvrx15.4	⊢ ( 𝜃 ↔ 𝜓 )
	mdandyvrx15.5	⊢ ( 𝜏 ↔ 𝜓 )
	mdandyvrx15.6	⊢ ( 𝜂 ↔ 𝜓 )
Assertion	mdandyvrx15	⊢ ( ( ( ( 𝜒 ⊻ 𝜎 ) ∧ ( 𝜃 ⊻ 𝜎 ) ) ∧ ( 𝜏 ⊻ 𝜎 ) ) ∧ ( 𝜂 ⊻ 𝜎 ) )

Proof

Step	Hyp	Ref	Expression
1		mdandyvrx15.1	⊢ ( 𝜑 ⊻ 𝜁 )
2		mdandyvrx15.2	⊢ ( 𝜓 ⊻ 𝜎 )
3		mdandyvrx15.3	⊢ ( 𝜒 ↔ 𝜓 )
4		mdandyvrx15.4	⊢ ( 𝜃 ↔ 𝜓 )
5		mdandyvrx15.5	⊢ ( 𝜏 ↔ 𝜓 )
6		mdandyvrx15.6	⊢ ( 𝜂 ↔ 𝜓 )
7	2 1 3 4 5 6	mdandyvrx0	⊢ ( ( ( ( 𝜒 ⊻ 𝜎 ) ∧ ( 𝜃 ⊻ 𝜎 ) ) ∧ ( 𝜏 ⊻ 𝜎 ) ) ∧ ( 𝜂 ⊻ 𝜎 ) )