I need help
- Jozytb
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I need help
Pa & ~Gab
UD: Natural Numbers
Px: {x | x is prime}
Gxy:{<x,y>|x is greater than y}
a:7
b:8
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- Posts: 482
- Joined: January 26th, 2013, 3:11 am
Re: I need help
The proposition "Pa & ~Gab" is a conjunction, so to prove it to be true, one has to prove each conjunct separately.
Interpretation: UD, Universe of discourse = the set of natural numbers, Px: {x | x is prime}, Gxy:{<x,y>|x is greater than y}. Ref (a)= 7 and Ref (b)= 8. Since Ref (a) ∈Ext (P), 'Pa' is true. 'Gab' is false, since <Ref (a), Ref (b)> ∉Ext (G). '~Gab' is true beacause 'Gab' is false. Since 'Pa' and ' ~Gab' are true, 'Pa & ~Gab' is true.
Is this the thing you were looking for? I am asking because it was quite straightforward, and I am thinking that you must have seen it already.
- Jozytb
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Re: I need help
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- Posts: 482
- Joined: January 26th, 2013, 3:11 am
Re: I need help
That was a done thing then. All praises and thanks be to God, the Almighty, the All-Wise.Jozytb wrote:Yes...
There is no problem. If I can help, then if God wills, I will help. If I cannot, then may be some other member may be more helpful.Jozytb wrote:If you don't mind I might have a question about it soon? Would that be okay?
Out of sheer curiosity, may I ask you why you are studying this? There is no doubt that logic is extremely important for various reasons and purposes. But my question is a personal question, in that I am asking you for your motivation for studying it.
Various possible answers could be :
1. To get good grades in the subject,
2. To be able to understand the arguments of other people and be able to judge whether they are logical or not.
3. To be able to think and express yourself logically.
4. religious requirement
5. educational institution requirement.
6. Etc...
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