according to the law of syllogisms, we have that if p is true and q is true then r is also true. we are given that:
[tex]p\rightarrow q[/tex]
That means that when p is true q is also true.
We are also given that:
[tex]q\rightarrow r[/tex]
Since we already established that q is true this means that r is also true. therefore, if p is true r is true.
