A prototype is a version of a product that has some, if not all, of the characteristics of the finished product, but it's not itself on the market. It doesn't usually even look like it might be. It's being tested. And this is language we're used to using with products.
But services can be - SHOULD be - prototyped as well, prior to their release for sale to the public. Here's what product prototypes do, and service prototypes should do as well:
- make the service real for customers and investors; makes them feel that real progress is being made
- enables detection of errors, and iteration and change, so you get better solutions, even early in the design process
- though users can't say what they want, they recognize it when they see it



Humorist
The one in charge doesn't usually want bad news. Sometimes kings would kill the one who brought the bad tidings. So one of the historical functions of the King's Fool is that of passing on the news that nobody else would dare. In the mask of the jester, the Fool would bring up the questions that would otherwise never arise from any of the King's "yes people."
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