Ahh, but the strawberries that’s… that’s where I had them. They laughed at me and made jokes but I proved beyond the shadow of a doubt and with… geometric logic… that a duplicate key to the wardroom icebox DID exist, and I’d have produced that key if they hadn’t of pulled the Caine out of action.
The upside of the technique is that it allows you to deduce the existence of real-world objects such as keys. The downside is that it drives you insane.
(More on the context of the quote here.)