## Tools for Thought |

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Page 49

For

between different levels of operation which can be considered as levels in a

hierarchical system; for

...

For

**instance**in biology it is convenient, in fact probably essential, to distinguishbetween different levels of operation which can be considered as levels in a

hierarchical system; for

**instance**, the ecological level, which includes all the living...

Page 121

In practice, as far as I can see from the history of scientific discoveries in my own

field of biology, and from my own experience, it has sometimes paid off to try to

disprove a hypothesis, and at other times to try to prove one. For

In practice, as far as I can see from the history of scientific discoveries in my own

field of biology, and from my own experience, it has sometimes paid off to try to

disprove a hypothesis, and at other times to try to prove one. For

**instance**, when ...Page 227

Then one has to try to put into the model quantitative estimates of the strengths of

interactions between the factors; for

population? These interaction effects ('multipliers' in the system-builder's jargon)

at ...

Then one has to try to put into the model quantitative estimates of the strengths of

interactions between the factors; for

**instance**what effect has pollution onpopulation? These interaction effects ('multipliers' in the system-builder's jargon)

at ...

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A. N. Whitehead actually alternative atoms attractor surface become behaviour better biological C. H. Waddington cent chreod Club of Rome complex systems components course curve deal diagram discussed effect epigenetic landscape estimates example experience exploratory forecasting exponential growth factors feed-back flats future Games Theory genes give graph happen homeorhesis human ideas important increase Information Theory input instance interactions involved kind large number mathematical means measure move natural resources operational research organized particular pattern pay-off table perhaps philosophy pollution population possible practical Prisoner's Dilemma problem processes produce relations relevance tree schismogenesis scientific method scientists sequence shape simple simulation situation sort statistics step strategy structure symmetry techniques technological Theory things tion Tools for Thought turn types U-Boats usually values variables Venn diagram whole worm