Which sentence from the passage best supports the idea that Nessie is not a plesiosaur?
As a result, there is probably not enough food to support such a large creature.

Second, it's unlikely that the same creature has lived in the loch since the last ice age.

So from a purely logical standpoint, the existence of such a large and ancient creature is unlikely.

With cell phones and digital cameras, one would think that sightings of Nessie would increase.