The invention “nobody does it, but everyone needs it”
The idea you describe suggests a revolutionary invention that solves a universal problem that most people aren't even aware of, or accept as inevitable. It's a solution so ingeniously simple, yet so fundamentally useful, that it makes one wonder why it hasn't been ubiquitous for much longer.
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These inventions are often characterized by the following features:
Solving an unconscious problem: You solve a problem that is accepted as “normal” or “inevitable” in everyday life, but which in reality could be significantly improved.
