In a classic episode of "Batman: the Animated Series" (called "Perchance to Dream"), Bruce Wayne discovers (spoiler alert) he is in a dream because he in unable to read a newspaper he picks up.  At first there are some ordinary words in the headlines, but everything becomes a jumble of gibberish as he attempts to read more closely. He later explains his reasoning by claiming that reading is a function of the right side of the brain, while dreams come from the left. 
My first question is: is this just a clever plot device or does it hold any water neurologically?  And second, if it were true, would it be an argument against I-could-be-dreaming-based skepticism?  Finally, third, the dream Bruce is having is a pretty good one, involving lots of things he would like but can't have in the waking world.  His murdered parents are alive again, he's going to marry a woman he loves, etc. Bruce says he can't accept it, however, because it "isn't real".  If you grant that he could keep on living on the dream world,...