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 __   _      ___    __    __     ___              
| || | ||   / _ \\  \ \\ / //   / _ \\      ___   
| '--' ||  | / \ ||  \ \/ //   | / \ ||    /   || 
| .--. ||  | \_/ ||   \  //    | \_/ ||   | [] || 
|_|| |_||   \___//     \//      \___//     \__ || 
`-`  `-`    `---`       `       `---`       -|_|| 
                                             `-`

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Text this: Completeness theory for propositional logics