Finding Nemo installs a new high-tech filter before the Tank Gang can escape. Marlin and Dory exit the East Australian Current and are engulfed by a blue whale. Dory communicates with the whale, which carries them to Sydney Harbour and expels them through his blowhole. They meet Nigel, who helps the pair escape from a flock of relentless seagulls and takes them to the dentist's office. Darla has just arrived, and the dentist is handing Nemo to her. Nemo plays dead to save himself as Nigel arrives, terrifying Darla and throwing the office into chaos. After Nigel is violently thrown out by
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