If a specific post was interesting or useful to you, we recommend that you Like that post. It tells the post author, and others, that you found the information valuable. Clicking Like is another way to let others know that you enjoy it without leaving a comment.
Log in to join the conversation and Like this content.
edit: Pit constantly changing his story is likely also a factor. Constantly building on and adjusting what he had previously said and then claiming he had said the complex thing earlier is rather annoying.