Roald Hoffmann

2002

1 Find a scientific textbook, a good dictionary, a pad of paper.

2 In the textbook find a place where a concept (for instance work, entropy, mass) is defined in words with the greatest precision. Write out the definition of the term on a piece of paper, call this ‘the hub’. Put it on floor, or paste on wall.

3 Look up in dictionary the definitions of every word in the definition, i.e. in the hub. Copy these out on a piece of paper, and arrange radiating out form the hub.

4 Keep on doing this, looking up the definitions of the definitions. Stop when you see a word in the hub used in any definition.