London courts declare “one” is legally anything between 0.5 and 1.5 (independent.co.uk)

By this legal definition I should be able to pay for a product priced at 1 pound with any amount from .5 pound to 1.5 pounds. As I understand numbers they represent an abstract concept of reality. To say anything between .5 to 1.5 should be 1 is to do injustice to all numbers both real and imaginary.