Finally one should add that in spite of the great complexity of protein synthesis and in spite of the considerable technical difficulties in synthesizing polynucleotides with defined sequences it is not unreasonable to hope that all these points will be clarified in the near future, and that the genetic code will be completely established on a sound experimental basis within a few years.

Chance is the only source of true novelty.

Evolution is cleverer than you are.

It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material.

Exact knowledge is the enemy of vitalism.

For simplicity one can think of the + class as having one extra base at some point or other in the genetic message and the - class as having one too few.

A theory should not attempt to explain all the facts, because some of the facts are wrong