!: The author views younger people as more conservative, a notion very different from perceptions of younger people today.
?: How does he reconcile the necessity for specialization because of our limited lifespans and the finite amount of knowledge an individual can accumulate?
Experiments I knew: Eratosthenes, Mendel, Curie, Newton, Pavlov, Millikan, Young, Paine.
Theories I knew: All except for information theory