Number of Premises in a Syllogism ?

  • Thread starter Thread starter Login
  • Start date Start date
Login
Messages
12
Reaction score
0
I'm a bit confused, is it acceptable to have more than two premises in a valid syllogism?
 
Physics news on Phys.org
Otherwise it is a polysyllogism, a sorites of prosyllogisms.
 
ah okay
 

Thread 'Deductive proof in logic formal systems'

I was reading documentation about the soundness and completeness of logic formal systems. Consider the following $$\vdash_S \phi$$ where ##S## is the proof-system making part the formal system and ##\phi## is a wff (well formed formula) of the formal language. Note the blank on left of the turnstile symbol ##\vdash_S##, as far as I can tell it actually represents the empty set. So what does it mean ? I guess it actually means ##\phi## is a theorem of the formal system, i.e. there is a...
View full post »

Similar threads

I The Nuances of Truth in Axioms and Premises
Replies
4
Views
2K
Is the Star Test for Syllogisms a Valid Method?
Replies
7
Views
3K
Is there a standard method for solving syllogisms?
Replies
14
Views
15K
Why Does This Syllogism Lead to a False Conclusion?
Replies
6
Views
8K
MHB Understanding Ke Logic Rules & Finding Contradictions
Replies
4
Views
2K
Master Propositional Logic Deductions: How to Infer R -> S with Q and R Premises
Replies
8
Views
2K
Arguments in sentential logic and contradictions/tautologies.
Replies
7
Views
7K
B Why use this premise behind the Maxwell-Boltzmann curve?
Replies
8
Views
1K
I Question regarding writing proofs
Replies
4
Views
1K
Proving the validity of this argument
Replies
6
Views
3K

Hot Threads

Recent Insights

Back
Top