Recent content by Leo Duluc

I came a cross this formal fallacie: If today is Saturday then tomorrow is Sunday. Is not Saturday. Tomorrow is no Sunday. I understand that the structure of the argument is not valid (denying the antecedent). But in this case to give this as an example is hard to absorb the idea...

Hi I am reading the book "Introduction to logic and the methodology of deductive sciences" and I'm doing my best on understandig it and so far so good, but I ran to the example of the book: " for any number x, if x=0 or y not equal to 0, then there exists a number z such that x=y.z" I just want...

thanks Thank you very much everybody you have clarified everything, you have been very helpful, and I thank you again.

ok, this may be a stupid cuestion, but it has gotten me very curious, and if somebody could help with it, I would appreciated very much thanks. Ok here it goes, why do we equal equations to 0 (zero) for example (quadratics ones) y don’t understand why, I have some ideas but I don’t know if...