Need help

Hira Javaid

New member
Use truth tables to show whether the following arguments are valid. If the argument is valid, explain why. If the argument is not valid, give a counterexample.
A ∨ B
B

I know the definition of valid arguments i know to make truth tables but i don't understand like how to do it...like do i need to make truth table of A or B then after it what should be the next step. Please help

pka

Elite Member
Use truth tables to show whether the following arguments are valid. If the argument is valid, explain why. If the argument is not valid, give a counterexample.
A ∨ B
B
I assume that the notation [imath]\dfrac{A\vee B}{B}[/imath] means If A or B is true that B is true.
[ [imath](1+1=2) \vee (2+1=4) [/imath] ] is a true statement; now is [imath](2+1=4)[/imath] a true statement?

Hira Javaid

New member
Use truth tables to show whether the following arguments are valid. If the argument is valid, explain why. If the argument is not valid, give a counterexample.
A ∨ B
B
I know the definition of valid arguments i know to make truth tables but i don't understand like how to do it...like do i need to make truth table of A or B then after it what should be the next step. Please help
I assume that the notation [imath]\dfrac{A\vee B}{B}[/imath] means If A or B is true that B is true.
[ [imath](1+1=2) \vee (2+1=4) [/imath] ] is a true statement; now is [imath](2+1=4)[/imath] a true statement?
Yes, may be pka

Elite Member
Yes, may be If one asks: Is the statement [imath]X[/imath] true and gets the answer "Yes, maybe" what does that mean, [imath]\text{ TRUE or NOT TRUE}~?[/imath]

Hira Javaid

New member
If one asks: Is the statement [imath]X[/imath] true and gets the answer "Yes, maybe" what does that mean, [imath]\text{ TRUE or NOT TRUE}~?[/imath]
True

pka

Elite Member
Have you ever had even a very rudimentary course in elementary logic?

Hira Javaid

New member
Have you ever had even a very rudimentary course in elementary logic?
I know very few about this subject. That's why i need help. I have done the questions in which i am good at it.