Degrees are a conventional, relative form of measuring temperature; water's boiling and freezing points were assigned the numbers 100 and 0 respectively. Minus 1 is not below nothing, but below water's assigned 0, its freezing temperature. I see nothing complicated or irrational about that.IreneY wrote:People who talk about mathematics as being so rational and so on and so forth forget to take into account that there is no such thing as minus 1 in nature. I am not talking about substraction I am talking about e.g. the temperature falling below zero. Below nothing? (there are other examples of how theoretical the science of maths is but that's one of the simplest examples I could think of).
There's another zero in relation to temperature, namely: Absolute zero, which is the lowest temperature imaginable, as all movement of particles and all friction has stopped. It isn't found in nature and scientists have not been able to produce it, but it is intelligible.
My mistake. What can be conceived in the mind cannot be rational or irrational, only intelligible or inintelligible. Rationality comes afteward. Still, I don't really get your point. 0 Celsius is just a point of reference, it doesn't mean "nothing".If you think of rational as something that is based in reason as I did when I used this word then in nature nothing can be "below zero".
You have to distinguish between 1) Energy, as the "thing", the reality found in the universe, and 2) Energy, as a concept formed by the mind from other ideas (such as force). Energy (1) was already in the universe before we understood what it was (2) and gave it a name. We did not invent it. How do we know we have understood it? Because we can manipulate it.ThomasGR wrote:Energy began as a rational concept, or a tool if you prefer, that existed only inside our (limited?) minds, and suddenly we can even produre matter out of it, even if we don't know what's energy. It looks our mind can manipulate reality.