It is notoriously difficult to define the word living.

A good scientist values criticism almost higher than friendship: no, in science criticism is the height and measure of friendship.

While Occam's razor is a useful tool in the physical sciences, it can be a very dangerous implement in biology. It is thus very rash to use simplicity and elegance as a guide in biological research.

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

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

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.

God is a hacker, not an engineer