There was once a stream, long ago, deep in the jungle. In this particular stream swam only one type of fish. Anyone was welcome to go fish there, under two conditions: you have to fish alone and you must throw back any fish you catch in to the stream. The fish will not bite if more than one person is standing on the bank or you are fishing with the intent to provide yourself with a trophy.

The local fishermen were very divided on their thoughts of what type of fish the stream held. One group claimed that the stream was stocked with trout, another catfish, and many, many more groups of fishermen swore they knew what kind of fish swam in that stream. Still others, however, claimed that the stream was barren - they had never caught a fish there, and they were great fisherman! Another group believed that there were fish in the stream, however without they themselves catching one, they couldn't decide what type of fish it was.

One fisherman believed for the longest time that there were, in fact, trout in this stream. Then one day he started to question the reasoning behind this belief. He, himself, had never caught a trout. Sure, a lot of people he knew claimed that they caught trout, but a lot more claimed that they caught something else. This particular fisherman started seeking out answers. He asked all the other fishermen he could find for advice; he read countless books. He tried for years to catch something in that stream, but his line always came out empty.

So, reader, I leave the following question with you - what was in that stream?