Groccery shopping. Daughter and her boyfriend - 20 and 19 - were packing the bags as I got out my wallet. The light's flashing so the Waitrose partner comes over to press the 'you can buy alcohol' button.
As she arrives, my daughter says, "Can we give you something towards all this?"
The Waitrose lady clocks this, and asks them for ID. My daughter shows hers. Her boyfriend doesn't have his with him, but he tells her he's 19.
"I don't think she can take your word for it, Jack," I say. "She has to see ID."
The Waitrose lady says that she can't sell us the alcohol because it might be for him.
I say, "I'm paying for it. He's just standing there."
"But the young lady offered to pay for it."
"And I'm not going to let her."
"Still, you might be buying it for him."
"Would you be taking this position if he were three?"
"No."
"Ten?"
"No."
"Fourteen."
"Probably."
"Then he's ten. He's very tall for his age."
"He's already said he's nineteen."
"Do you believe that?"
"Yes. No. I mean....it doesn't matter what I believe..."
"Then he's ten, and it doesn't matter whether you believe it or not."
In the end, they had to go out to the car park while I paid, then come back to fetch the bags.