The bradys must hold that, on the average, cumulative selection has to add a little information to the genome at each step. But of all the mutations studied since genetics became a science, not a single one has been found that adds a little information. It is not impossible, in principle, for a mutation to add a little information, but it is improbable.
The NDT was an attractive theory. Unfortunately, it is based on the false speculation that many small random mutations could build up to large evolutionary changes.

Autor: Lee Spetner