Not really a math question but has anyone had any experience working with proofs? I need to present a proof to my intermediate logic class and i want to know if it's correct or not.
Printable View
Not really a math question but has anyone had any experience working with proofs? I need to present a proof to my intermediate logic class and i want to know if it's correct or not.
There are many kinds of proofs. If it's not a 50 page monstrosity you can post it here. It never hurts to try.
If all else fails...
try...
"YOU KNOW DAMN WELL!"
:D
a mathematical proof?
or deductive knowledge, and thereby proof?
Then we could branch off and talk about religious proof?
Or how different cultures have different proofs.
I reckon (hmm. I very rarely use that word) that deductive knowledge is by far the easiest to explain and defend.
bob got below 55% in his maths exam
averyone below 55% fails, therefore Bob fails. The problem is, the more specific you are, the easier it is to be proven wrong.
That's why it's conditional...
Like... if a=b and b=c then a=c.
Yes exactly. A basic proof in prepositional logic would look somthing like this. 1.) if a then bQuote:
Posted by DiGiTaIErRoR
That's why it's conditional...
Like... if a=b and b=c then a=c.
2.) ~b / ~a
So you would have to figure out how to derive ~a using rules of inference. So the completed proof would look like this.
1.) if a then b
2.) ~b / ~a
3). ~a modus ponens 1,2
Natural deduction is equal to the power of a truth table as far as proving validity but it cannot be used with any facility to prove invalidity.