"A true aphorism legitimates itself; whoever feels the need to legitimate an aphorism, admits that it is illegal. The …"

"Science should be distinguished from technique and its scientific instrumentation, technology. Science is practised b…"

"[The goal of developmental research is to] consciously experience, describe and justify the cyclic process of develop…"

"No mathematical idea has ever been published in the way it was discovered. Techniques have been developed and are use…"

"Our mathematical concepts, structures, ideas have been invented as tools to organise the phenomena of the physical, s…"

"No scientist is as model minded as is the statistician; in no other branch of science is the word model as often and …"

"No statistician present at this moment will have been in doubt about the meaning of my words when I mentioned the com…"

"The urn model is to be the expression of three postulates: (1) the constancy of a probability distribution, ensured b…"

"The subject of a science is never well circumscribed and there is little use sharpening its definition. However, nobo…"

"Educational technique needs a philosophy, which is a matter of faith rather than of science."