I recall a comedian recently (it may have been Lee Mack) explaining the defect in the Humpty Dumpty story. You know the one:
All the king's horses and all the king's men, couldn't put Humpty together again.
'There's the root of the problem,' he said. 'They shouldn't have let the horses go first.'
The other evening I found myself in the company of some other folk and Thin Lizzy's greatest hits and, in a lull in the conversation which I may have caused by paying too much attention to the music, I noticed the line in Whisky in the Jar:
I first produced my pistol
Then produced my rapier.
Now, were he able to speak to us from the grave, the late, great drug-addled Phillip Lynott has to admit his highwayman of the narrative has made a very basic error there. Frankly, if the gun ain't scaring the ambushed a sword isn't going to get the job done. Look at it this way. You're holding up a stagecoach and you've done the, 'Your money or your life' speech and they've opted for the life to go (a bit silly because then the money more than likely goes too - I don't think highwaymen ever really meant it as an either/or). Are you going to shoot them? Or are you going to have another go with the sharp thing in your hand?
More examples please.