Repairing Arguments

You shouldn't play that game because you'll end up not doing your homework.

The conclusion is there, but it need a premise like, "video games are addicting and will take up a lot of your time." Then it needs a sentence to link to the conclusion. "Being addicted to something will prevent you from doing other things." This sentence is the glue that links the premise with the conclusion. It could even use some evidence like if you know that the person you are trying to convince plays games and ends up not doing their homework, then that could back up your conclusion. This follows the rational discussion rules that the person knows about the subject, is able to reason well, and is not lying. To repair the argument, with the claims it makes the argument stronger or valid, the premises are plausible, and the premises are more plausible than the conclusion. So the new argument would be:
"Video games are addicting, and when you play you will get addicted. Being addicted to something will prevent you from doing other things, such as your homework. You shouldn't play that game because you'll end up not doing your homework."
This is now a good argument.