| E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898. |
| | | Whats What. | | |
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He knows whats what. He is a shrewd fellow not to be imposed on. One of the senseless questions of logic was Quid est quid? | 1 |
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| He knew whats what, and thats as high |
| As metaphysic wit can fly. | |
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Butler: Hudibras, part i. canto 1. |
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