That's right. I doubt that. Let me explain, Thank is according to your own words, meant to express thankfulness that it was posted or shared. We choose this to appreciate their time or candor, encourage them to post more, etc. If we weren't thankful to someone for any reason like their unfairness, we would choose dislike or would just ignore the post. If we choose like, it means we are thankful and do agree with the post. In other words, we choose like in so called overlap situations.