Ghm. Mathematics and sciences are rather successful in reality. Natural language can be used in a rather rigid and formal manner - and mathematical language can

Ghm. Mathematics and sciences are rather successful in reality. Natural language can be used in a rather rigid and formal manner - and mathematical language can be used carelessly and in error. (In fact, using natural language carefully may be preferable to playing with formal symbols - as it makes gaffes and logical gaps more visible to the readers.)