Can an AI recognize my opinion from tweets?

To make a long story short: In principle; yes. And if my colleagues at the University of Edinburgh are to be believed, it even works in cases where an opinion is not explicitly expressed. In fact, the terms "sentiment analysis" or "opinion mining" are nothing new to people who deal with language technology. However, this is not infrequently a marketing ploy: because what sounds like opinion analysis is in fact usually nothing more than a polarity analysis of the feelings that are transported via a text. In other words, it analyzes whether a social media post has positive or negative vibes.