Even though we don't realise it when we say we know what someone thinks about something, we are guessing. Even mind-reading – in a fairground or on stage – is trickery. Yet we often allow our own thoughts and behaviour to be goverened by what we claim someone else will think. Maybe it's time to review what we 'know'.
Thinking that we have supernatural powers can cause difficulties. Take mind reading for example. There is only one way to be sure that you have understood another person correctly. However well you know them, you can't read their mind, so check before acting. The problem is compounded when your relationship is long-standing; your partner invariably thinks they know what you mean, and vice-versa. It's not the exchange of information that is the problem, it's that we believe we know what it means.
Prediction is the name of the game we are all involved in. We play it without realising we are, and we also fail to notice how bad we are at it.