The output of the hashing is unpredictable, you can't know what will change in the output if you change somthing in the input.
What's the relationship between the input and the output? Isn't there some kind of determination of a certain output given by a certain input? Will a given input always produce the same output? My apologies, I don't quite get it.
In another thread that I read, I envisioned it as a 'guess-the-number' game. So, it'd be like if I told you to "guess a number between 1 and a million" where the only acceptable values are 0, 1, 2, and 3, and then after a difficulty increase, the only acceptable numbers are 0, 1, and 2, and so on. There's no way to tell your computer to hash out all 0's for example?
