Real-world problems can change as people interact with them, making them non-stationary.

“and hit afterwards your question but when you let go he would shape shift so so um there's this thing that with problems in the real world when we interact with them they shape shift and they're non-stationary but what we try to do though as mathematicians and scientists is is we learn knowledge and representations at an increasingly high level of abstraction and the purpose of that is that the knowledge is less shape shifty so it kind of feels like we almost need to have”