The best time to plan an experiment is after you've done it.

It was Darwin's chief contribution, not only to Biology but to the whole of natural science, to have brought to light a process by which contingencies a priori improbable, are given, in the process of time, an increasing probability, until it is their non-occurrence rather than their occurrence which becomes highly improbable.

The more highly adapted an organism becomes, the less adaptable it is to any new change.

Experimental observations are only experience carefully planned in advance, and designed to form a secure basis of new knowledge.

Natural selection is not evolution.

The statistician cannot evade the responsibility for understanding the process he applies or recommends.

Although no explanation can be expected to be satisfactory, it remains a possibility among others that Mendel was deceived by some assistant who knew too well what was expected. This possibility is supported by independent evidence that the data of most, if not all, of the experiments have been falsified so as to agree closely with Mendel's expectations.