Trust and maps.
I am at my dad's because he's having his roof repaired, which is always stressful. The builders came last week to set up the scaffolding, only they went to the wrong street - the correct house number, but the wrong street - and built the entire platform (the owners were at work, obviously) before realizing their mistake. I've just asked the boss what happened. He said: "The sat-nav told the driver he'd arrived, he didn't think he might not have."