Thursday, 28 January 2021

A Concise Introduction to Logic, Patrick J. Hurley, Wadsworth, 2006, 9th ed,. 8.7, II, 20, p. 448

 

1.     (x)[Fx ⊃ (Gx • x = n)]

2.     Gn ⊃ (∃x)(Hx • x = e)

∴ Fm ⊃ He

3.     Fm

4.     Fm ⊃ (Gm • m = n)

5.     Gm • m = n

6.     Gm

7.     m = n • Gm

8.     m = n

9.     Gn

10. (∃x)(Hx • x = e)

11. Hr • r = e

12. Hr

13. r = e • Hr

14. r = e

15. He

16. Fm ⊃ He

 

 

 

ACP

1 UI

3,4 MP

5 Simp

5 Com

7 Simp

6,8 Id

2,9 MP

10 EI

11 Simp

11 Com

13 Simp

12,14 Id

3-15 CP

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