To make good decisions (about tree risk) means that we have to have confidence in what we do know and what we don't know. This double-header about confidence is a great listen from the BBC World Service.
It's probably not much of surprise to find out there's very little overlap between confidence and competence; how good people think they are, and how good they really are.
Confidence: Why it misleads us
But confidence can also be a force for good. Here's how.
Confidence: How it can help us