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2. Storing failed cases can be effective in more quickly finding better solutions  3. Storing all solutions isn't optimal as we need to only store solutions that are novel in their parameter space.  ## The Cognitive Connection  Analogical reasoning depends on a spectrum of similarity:  1. On side: problems *identical* to previous problems: simply retrive solution and apply  2. Other side: problems semantically dissimilar from previous problems: to be discussed later  3. Now: problems which are similar (yet not identical) to previous problems (the most common in human cognition).