Finding Nemo devises a plan to escape: jam the tank's filter with a pebble so the dentist will have to put the fish in plastic bags to clean the tank, then roll out the window and into the harbor. Nemo attempts to jam the filter but fails, nearly dying in the process. The mask falls into a trench in the deep sea, where, while battling an anglerfish, Dory reads the address as "42 Wallaby Way, Sydney". To her own disbelief, Dory remembers the address despite her short-term memory loss. Dory and Marlin receive directions to Sydney from a school of moonfish. On
Forgetful functor set, privileged subsets of the underlying set, etc.) which may satisfy some axioms. For these objects, a commonly considered forgetful functor is as follows. Let formula_1 be any category based on sets, e.g. groups—sets of elements—or topological spaces—sets of 'points'. As usual, write formula_2 for the objects of formula_1 and write formula_4 for the morphisms of the same. Consider the rule: The functor formula_11 is then the forgetful functor from formula_1 to formula_13, the category of sets. Forgetful functors are almost always faithful. Concrete categories have forgetful functors to the category of sets—indeed they may be "defined" as those categories