According to Brewer's Dictionary of Phrase and Fable -
If something is 'Neither rhyme nor reason' - it is fit neither for amusement nor instruction. It came into being when an author took his book to Sir Thomas More, Chancellor of Henry VIII and asked his opinion. Sir Thomas told the author to turn it into rhyme. He did so and submitted it again to the Chancellor who said : "Ay! ay! That will do, that will do. 'Tis rhyme now, but before it was neither rhyme nor reason."
I know now what mother meant you see,
Her phone was dead, why would that be?
( it turns out it she had pulled it out of the wall.)