"...and then I told him, 'But at this rate almost everything one says, except things like "Pass the marmalade" or "There's a cat on the roof", turns out to be a sort of lie.' Hugo pondered this. 'I think it is so,' he said with seriousness. 'In that case one oughtn't to talk,' I said. 'I think perhaps one oughtn't to,' said Hugo, and he was deadly serious."
Iris Murdoch "Under the Net"
"Wovon man nicht sprechen kann, darüber muß man schweigen."
L. Wittgenstein "Logisch-philosophische Abhandlung"