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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Daniel Cerqueira <dan.list@lispclub.com> Newsgroups: comp.lang.lisp Subject: Re: Undefined in LISP Date: Sat, 29 Mar 2025 13:44:39 +0000 Organization: A noiseless patient Spider Lines: 36 Message-ID: <87ldsoq7co.fsf@lispclub.com> References: <87ldsyatmd.fsf@lispclub.com> <vrlajl$2uuho$2@dont-email.me> <87ecyp9slp.fsf@lispclub.com> <vrnbpo$rkfk$2@dont-email.me> <87bjtr3cu4.fsf@lispclub.com> <vrq5m0$3gje1$2@dont-email.me> <877c4e310s.fsf@lispclub.com> <vrso0s$1toah$2@dont-email.me> <878qorz087.fsf@DEV.NULL> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Date: Sat, 29 Mar 2025 14:44:39 +0100 (CET) Injection-Info: dont-email.me; posting-host="ac3a28503175a9c95d20b2c00c30c747"; logging-data="1532640"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+nX7jBFrumCCbe3pl3R2thWk0Qi9KWt1A=" User-Agent: Gnus/5.13 (Gnus v5.13) Cancel-Lock: sha1:77r98EBZTObqZnhYDyIcc1NVRVg= sha1:brst+JN5bixKQgLKjLCkOSfmZLY= Bytes: 2513 Robert Girault <rgirault@gmail.com> writes: > Lawrence D'Oliveiro <ldo@nz.invalid> writes: > >> On Mon, 24 Mar 2025 15:24:03 +0000, Daniel Cerqueira wrote: >> >>> Lawrence D'Oliveiro <ldo@nz.invalid> writes: >>> >>>> On Sun, 23 Mar 2025 16:56:35 +0000, Daniel Cerqueira wrote: >>>> >>>>> Does every LISP S-expression need to have a value (need to be >>>>> evaluated)? Is atributing a symbol to undefined behaviour needed? >>>> >>>> Which is why I said, the natural way to have an “undefined” value is >>>> for the computation not to terminate at all. >>> >>> To not terminate is not natural at all, it is also not a natural way. >> >> That’s a very unnatural thing to say. > > Unnatural and ungrammatical. Unfortunately, there are some people that think that they live forever (being being alive a natural thing), and prefer to spend their limited amount of time bashing at people who acknowledge natural things, such as life having death. Also, programs being stuck in a idle forever loop, is also not natural, and it is the opposite at what programs are meant to do. But stupid people may disagree, until, one day, their disagreement stops, as everything in life. -- The pioneers of a warless world are the youth that refuse military service. ~ Albert Einstein