Quote Originally Posted by poop
If a mathematical function returns a value with a limit of 0, that means as the input value gets larger, the output value gets closer and closer to 0 but never reaches it. It instead becomes infinitesimal.
Ok, so like the reciprocal of a pair of numbers... the larger the one number, the smaller the other number. As we approach infinity, the reciprocal approaches zero.

But so long as one number is defined, so is the reciprocal. However large the larger number gets, so long as it is not infinite, then its reciprocal will not be infinitesimal. We can measure it. It is 1/x, that is a meausrement because we know x. Only if we don't know x can we not know 1/x.