# 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.