statement énoncé true An information content entity that describes some relationships between some entities and is intended to be evaluated as true or false. e=entity r=relationship "Unicorns exist" e1: a single horned animal e2: an equestrian animal e3: spatial region of universe r1: e1 is a e2 r2: e1 located in e3 "You have chest pain" e1: chest pain e2: patient referred to by 'you' r1: e2 experiencing e1 "The traffic light is green" "You have not taken a dose in the last 6 hours" "less than 12 dispensings have occurred"