Scientist vs. Engineers
This article explains the difference between scientist and engineers.
Start with a puzzle that is unclear, that probably already have clear pieces put together, yet plenty of unclear pieces missing, which is what causes the entire puzzle which is the picture to be unclear. They then put in different pieces using trial and error to figure out which piece makes a particular area of the puzzle or picture more clearly. Then they run experiments on this new clear piece inserted to figure out how the piece made the particular area more clearly! The results from these experiments are what ultimately the scientist look at the unclear pieces in the beginning or the card to why the scientist had to research and experiment with the clear piece. So equation: puzzle = uncleanness = missing = piece + clearness + experiment = complete clearness for one missing piece which helps brings complete clearness the whole puzzle (picture)!
Starts with clear pieces that were experimented on by scientist and design an entire new puzzle with them that is more clear the previous clear puzzle that became less useful!