Truth value of conclusion Here I are premises followed by a conclusion. I want to confirm if my understanding about conclusion being false is right or not. In the book it was mentioned that their conclusion is false. 
My understanding about first premises is: 
"having access to network does not mean you can change grade"
So I am guessing that to find out if conclusion is true or not we compare it with real life situation. If in reality it can happen then its true otherwise not. Am I right about it?
“If you have access to the network, then you can change your grade.”
“You have access to the network.”

∴ “You can change your grade.”

It his simply an instance of modus ponens :


from $p$ and $p \rightarrow q$, infer $q$.


Your $p$ is : "You have access to the network”.
Your $p \rightarrow q$ is : "If you have access to the network, then you can change your grade”.
Thus, you are licensed to infer :


$q$, i.e."You can change your grade".


