A guide to deduction A warm car hood on a parked car indicates the car has been in that spot for half an hour or less (or a bit longer if the car has a larger engine). But be mindful of this indicator if the car is parked in direct sunlight.
A guide to deduction You can tell when a person is truly smiling at you by the amount of muscles moving in their face. When someone smiles truly at you their eyes and nose will crinkly. When they are not, the muscles are very stiff.