Science-backed techniques to help you make hard decisions

This was about twenty years ago, as three of us travelled round the republic of Ireland in an old transit van in the summer holidays from University.

We were a bit lost and I pulled up next to an old fella and his collie dog on a one lane road out in the middle of nowhere. I asked him how he would get to Limerick and after looking around with a pained expression for a few seconds, he turns to us and says, "my sister takes me".