George Box, a famous statistician, once said, "All models are wrong, but some are useful.” What did George Box mean by this statement?

~potters6/te801/biology/biounits/respiration.htm

The need activity of the nurse is to suction discharges from the trachea. current treatment approaches in the pressing consideration facilities or crisis offices are corticosteroids and nebulized epinephrine; steroids have demonstrated advantageous in extreme, direct, and even gentle croup. in the clear instances of croup, anti-microbials are not endorsed, as the etiology is viral

They use the si unit, or metric system its all the same thing