1 = 0,99........

[BAndrew]

3) Stephen Hawking also "proved" quite efficiently that the universe is not infinite but that's only because it cannot possibly be measured now. Laws are based around the knowledge we have at any given point in time, and laws have to be changed and revised constantly to accommodate new advances in science. Before the theory of relativity was developed for example scientists probably believed any speed attainable whereas now we know that anything with a positive mass is confined to speeds below the speed of light (e=mc^2). I don't doubt that 0.9~ is provably 1 but just like quarks are now measurable perhaps the real distance between 0.9~ and 1 will be measured at more than 0 in the future. Before quantum mechanics were invented, nobody would have imagined anything smaller than an atom but now we know that matter is constructed of particles even smaller than quarks.

All I'm saying is that it's possible we will be able to calculate the difference between 0.9~ and 1 some day; you even said it yourself: it's infinitely small. Maybe infinitely small today, but what about tomor

There is no difference bewteen 1 and 0,99999, it is the same thing. It is mathematically proven and that won't change no matter how small scales we are going to discover.