Is the normal expression 'as dim as dishwater' or 'as dim as ditchwater? When you google this it comes up as 'dull as dishwater/ditchwater'. There is a difference between being 'dim' and being ...
In school, we're taught that similes are analogies using "like" or "as". This is clearly just a mnemonic for a comparison between two distinct objects. Metaphors on the other hand combine the two ...
I've always been taught that metaphors and similes both draw a parallel between two disparate ideas/thoughts/objects, but that a simile is a more explicit comparison using the word "like" or "is", ...