## 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

... try to prove one. For

was not trying to disprove anything, but was rather trying to verify a hypothesis

which he had formulated on the basis that each organism has two parents. Again

...

... try to prove one. For

**instance**, when Mendel discovered his laws of heredity hewas not trying to disprove anything, but was rather trying to verify a hypothesis

which he had formulated on the basis that each organism has two parents. Again

...

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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