Your friend measures thetemperatureof her coffee to be70Celsius. Your friend also notices that thetemperatureoutside is35Celsius. Why is it incorrect to say that the coffee is twice as warm as thetemperatureoutside?

This is for my college statistics class, and I can't figure out the answer for the life of me. I'm thinking it's because the number is continuous instead of discrete, so we don't really know if the numbers are rounded.