What Is Constructor Theory?

Now, given any particular task, such as {3→4}, the constructor is capable of performing this task if, whenever given the substrates in the input attributes, it changes them to having the output attributes. By the way, as we said, the constructor itself must not have any net change over the course of the process: it ends up back where it started.

We don’t care what happens when the constructor is given a substrate with a different attribute than the allowed input ones. For instance, a constructor for a task on the die, e.g. {3→4}, when given a non-allowed input, such as a die whose upturned face is 6, may produce anything in output – even destroy it, or turn it into a garden gnome.

from Hacker News https://ift.tt/3ta90UO