Suppose a student is in a group discussion on Canvas, and there is a post she thinks is great, so she "likes" it. Can she "like" it *again* and cause it to have any number of likes? I'm wondering because I want to know what kind of inferences I can draw from the fact that a particular post got the most likes in a student group discussion. If individual students can like a particular post multiple times, that high count of likes doesn't ensure that many students thought well of the post. Thanks.