I think the meaning of the sentence you're replying to is that GitHub's features are a superset of Git's features which seems true? "Github isn't all git [some

I think the meaning of the sentence you're replying to is that GitHub's features are a superset of Git's features which seems true? "Github isn't all git [some features of GitHub are not in Git], but all git is Github [but all features of Git are in GitHub]." Maybe my interpretation is incorrect?