 Similarly, Linus Pauling proposed a well-defined model of DNA that was likewise implausible yet thought-provoking to other investigators.Conversely, the cyclol model is an example of an incorrect scientific theory of great symmetry and beauty, two qualities that can be regarded as signs of "obviously true" scientific theories.For example, the Watson-Crick double helix model of DNA is sometimes said to be "obvious" because of its plausible hydrogen bonding and symmetry; nevertheless, other, less symmetrical structures of DNA are favored under different conditions.