So I recently got confused when comparing a set of plurals. I know normally when you compare singular you add a +s to the verb and you don't with plurals, but then I came across this while trying to help a non-English native:
Its advantages outweighs its disadvantages"
Now to my brain this sounds correct, but the rule as I know it doesn't support it. I know their are other exceptions to this rule, like when I say "I outrun you", but I can't think of a reason as to why these plurals are acting like singulars. Anyone have any ideas?