AI reads your tweets and spots when you're being sarcastic

Without a helpful hashtag, picking up on sarcasm online can be hard even for humans. But now a machine learning system can automatically recognise when individuals are being sarcastic. Mining people's comments on social media is big business. Advertisers track people's attitudes and moods, companies and governments follow public opinion. But people being sarcastic and saying the opposite of what they actually mean is super tricky to pick up on.