A theoretical situation that bears absolutely no relation to anything that may have happened in the past, may currently be happening or may be about to happen in the future...
A woman one day decides that she needs some vegetables, so she and her husband go shopping. The husband knows that his wife is particularly fond of Farmer Brown's vegetables so they drive all the way out to his farm. Farmer Brown's vegetables are rather expensive, but they are some of the tastiest vegetables in the area, so it's worth the drive and extra cost.
The woman chooses four onions and a lettuce and Farmer Brown offers to deliver them on Tuesday, which is fine with the woman as she doesn't need them until Wednesday. The woman and her husband leave the farm and take the long drive back to town.
Tuesday finally arrives and the eager anticipation of the tasty vegetables has kept the woman and her husband excited all week. The phone rings early in the morning and the husband answers it, "Hello."
"Ah, hello Husband, it's Farmer Brown here"
"Hello Farmer Brown, how are you today?"
"I'm fine thanks, I'm afraid I have bad news though. When I told you I had lettuce, I made a mistake, I was actually looking at my cabbages at the time. I won't have lettuce for another three weeks."
"What?"
"Yes, sorry, I didn't realise until today, when the delivery boy came to load your order into the basket on his bike."
The husband explained the problem to his wife, who decided that she liked Farmer Brown's lettuce so much, that it would be worth waiting another three weeks.
"Okay, Farmer Brown," said the husband, "we'll wait for the lettuce, what time are we getting our four onions today."
"Oh," said Farmer Brown, "the delivery boy didn't take them since your lettuce wasn't ready. I can cancel your order and refund your money, or give your four onions to Postman Joe to drop off on Friday."
By this time the husband was very tempted to cancel the order and go and get a lettuce and four onions from Farmer Green instead, but remembering how much his wife loved Farmer Brown's vegetables, sighed and said, "Okay, send them with Postman Joe."
Friday arrived and the husband got home to discover that Postman Joe had delivered not
four but
six of Farmer Brown's very expensive onions. This was almost certainly a mistake on Farmer Brown's part. He has never been known to give any of his very expensive onions away for free and had not indicated he was going to do so in any of the conversations he had had with the husband.
Whilst the husband and wife wait another two and a half weeks for their lettuce they can certainly use Farmer Brown's two extra onions but the question is, should they?