Conditional proof for multiple quantifier

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SUMMARY

The discussion centers on proving the logical statement ((Ǝx) F(x) → (Ǝx) G(x)) using conditional proof techniques. The premises provided are ((Ǝx) F(x) → (∀z) H(z)) and H(a) → G(b). Participants suggest that a formal proof in a logical calculus framework is necessary for clarity. A reference link is provided for further guidance on formal proof methods.

PREREQUISITES
  • Understanding of first-order logic and quantifiers
  • Familiarity with conditional proof techniques
  • Knowledge of logical implications and their structures
  • Basic proficiency in formal proof systems
NEXT STEPS
  • Study formal proof systems in first-order logic
  • Learn about conditional proof strategies in logic
  • Explore the implications of existential and universal quantifiers
  • Review examples of logical proofs involving multiple quantifiers
USEFUL FOR

Students of logic, mathematicians, and anyone interested in formal proof techniques and quantifier manipulation in logical statements.

lize
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Hi, I don't know how to prove ((Ǝx) F(x) →(Ǝx) (G(x)) with conditional proof from:
((Ǝx) F(x) → (∀z) H(z))
H(a) →G(b)

Thanks
 
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What kind of proof do you have in mind? If you are talking about a formal proof in some logical calculus, then please see https://driven2services.com/staging/mh/index.php?threads/29/.
 

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