And that is that social theories are reflexive. Heisenberg’s discovery of the uncertainty principle did not alter the behavior of quantum particles one iota, but social theories, whether Marxism, market fundamentalism or the theory of reflexivity, can affect the subject matter to which it refers. Scientific method is supposed to be devoted to the pursuit of truth. Heisenberg’s uncertainty principle does not interfere with that postulate but the reflexivity of social theories does. Why should social science confine itself to passively studying social phenomena when it can be used to actively change the state of affairs? As I remarked in The Alchemy of Finance, the alchemists made a mistake in trying to change the nature of base metals by incantation. Instead, they should have focused their attention on the financial markets where they could have succeeded.-- George Soros, excerto do artigo "General Theory of Reflexivity" extraído de FT.com
Baseado na dica disponível em: https://liquidat.wordpress.com/2013/05/07/howto-changing-the-expiry-date-of-gpg-keys/ 1. Primeiramente, você precisa saber o ID da chave, neste exemplo ABCDEF12 : $ gpg -list-keys liquidat@example.com pub. 2048R/ABCDEF12 2012-09-10 [expires: 2032-09-10] id liquidat sub 2048R/BCDEF123 2012-09-10 [expires: 2032-09-10] Com o ID em mãos pode-se editar a chave: $ gpg --edit-key ABCDEF12 ... A chave pública está disponível. ... pub. 2048R/ABCDEF12 ... sub 2048R/BCDEF123 ... ... gpg> 2. Agora vamos efetivamente mudar a data de expiração: gpg> expire Changing exporation time for the primary key. Please specify how long the Key should be valid. 0 = key does not expires = key expires in n days W = key ...