The document discusses prototyping and provides examples of different types of prototypes including paper prototypes, digital prototypes, storyboards, role plays, and space prototypes. It explains that prototyping is used to make ideas tangible and test reactions from users in order to gain insights. Prototypes should be iterated on and fail early to push ideas further and save time and money. Both low and high fidelity prototypes are mentioned as ways to test ideas at different stages of the design process.
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