in smalltalk you are always running inside of a live system, so if you made a mistake its immediate that it happened right then and there, but in obj-c its a co

in smalltalk you are always running inside of a live system, so if you made a mistake its immediate that it happened right then and there, but in obj-c its a code-build-run environment so the place you changed and the state you have to progress to to exercise that change are far away and you might not catch it until runtime / in the field.