For this exercise we were required to revisit our definition of a prototype from week 1.
My understanding of prototyping has changed since week 1. I know now that there can be different types of prototypes which range from ones that test an overall design concept to one that tests in-depth functionality, or even a combination of both.
Prototypes can be used to test specific elements of a concept as opposed to the entire concept as a whole.
From my experiences this semester, I've learnt that prototypes can be built upon for subsequent iterations. They don't always have to be rebuilt from the ground-up, unless you're trying a completely different approach.
The key to prototyping is good user feedback. Without it, you will never figure out the strengths and weaknesses of your concept.