'Excuse me, this egg timer I bought from your shop is not working, can I please return it.’
Employee looks at the instructions for the egg timer for the Stupid Customer.
‘This egg timer is too difficult to understand, can I please have the full refund.’
‘Sorry we don’t offer refunds, only exchanges or credit notes.’
‘I don’t want a credit note.’
The Stupid Customer accepts the exchange. However, decides on exchanging the egg timer for an identical one to the original she tried to return.