from Brown Corpus
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In light of all this, one would require special reasons for saying that the paths of the heavenly bodies were other than circular.
Why, for example, should the ancients have supposed the diurnal rotation of the heavens to be elliptical??
Or oviform??
Or angular??
There were no reasons for such suppositions then.
This, conjoined with the considerations above, made the circular motions of heavenly bodies appear an almost directly observed fact.

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