Author G.K. Chesterton wrote that many a man had been hanged on less evidence than has been amassed to support the belief that the Loch Ness monster is a reality. Many have put forward numerous suggests as to the identity of the Loch Ness monster and perhaps the most popular theory is that the animal is a plesiosaur. This theory does not sit well with what is known about the plesiosaur. It was ill-equipped for spending prolonged periods of time underwater and was prone to spend most of its life on the surface. Other have posited that Nessie is a salamander or some other gigantic amphibian, a theory which may account for the fact that no monstrous body has vere washed up onthe shores of the Loch.
Amphibians dintegrate underwater and their remains are unlikely to surface.
However amphibia lay there gelatinous eggs on the surface and these would be seen more frequently were this the case. The Loch Ness Investigation Bureau mounted a ten year search for the animal from 1962-72 without obtaining any significant evidence in the quest to obtain Nessie's identity. Similar efforts by Operation Deepscan which used a sonar blanket to cover the loch, did obtain several tantalising contacts with large objects underwater, but the objects moved out of the range of sonar so no further investigation into what was causing the sonar images was possible. By exposing the hoaxes, Boyd has not ruled out the remainder of the evidence amassed from eyewitness accounts, but has merely discarded a single piece of supposed evidence of dubious origins. Sightings have continued unabated at Loch Ness since the hoax story came to light so evidence continues to accumulate to prove the case that there is a large unknown animal of indeterminate origin making frequent appearances to stunned witnesses.