. 2018 Aug 2;9:877. doi: 10.3389/fphys.2018.00877
Copyright © 2018 Martinez-Sanchez, Huerta, Alvarez-Buylla and Villarreal Luján.
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| p and q | p⋅q |
| p or q | p + q-p⋅q |
| not p | 1-p |