2 ms·The Perfect Device23 points by surprisetalk 9mo agonine_k 9mo agoAccording to TRIZ [1], the perfect device is such that it's not present, but its function is performed. (This device is neat, but is not that.) [1]: https://en.wikipedia.org/wiki/TRIZ https://en.wikipedia.org/wiki/TRIZJang-woo 9mo ago[flagged]