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| | relations between them and to reason about the consequences of any |
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| | restrictions. |
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| | By way of example, we've taken two overlapping breakdowns of |
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| | geography, the [British Isles](https://upload.wikimedia.org/wikipedia/commons/2/28/British_Isles_Euler_diagram_15.svg) and the British Islands and created |
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| | geography, the [British Isles](https://en.wikipedia.org/wiki/Terminology_of_the_British_Isles) and the British Islands and created |
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| | simple datasets about the populations of the various parts. |
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| |  |
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| |  |
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| | This directory contains the following: |
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| | [population-british-isles.csv](population-british-isles.csv) contains |
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| | |
