From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail From: Paul Rubin Newsgroups: comp.lang.ada Subject: Re: Intervention needed? Date: Wed, 27 Mar 2019 14:02:10 -0700 Organization: A noiseless patient Spider Message-ID: <87a7hgvxnx.fsf@nightsong.com> References: <6e1977a5-701e-4b4f-a937-a1b89d9127f0@googlegroups.com> <6f9ea847-2903-48c8-9afc-930201f2765a@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: reader02.eternal-september.org; posting-host="790546bab704e0ce6fbb1d654b7e5b2f"; logging-data="16483"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+vYtLtogz1PAZEak2hgSNv" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux) Cancel-Lock: sha1:68lI20n9eIxcoDJvDr4Hn5jvpZg= sha1:OCZ1yi2qpqtvdDIcWn+dsgTiDgA= Xref: reader01.eternal-september.org comp.lang.ada:55982 Date: 2019-03-27T14:02:10-07:00 List-Id: G. B. writes: > For some N% of Ada programs, will a computation of a proof be > predictably finished in time? .. Static knowledge is a privilege not > shared by many, or much, I suppose. If you haven't got some reasoning in your head that the program is pointer-correct, you shouldn't deploy it. If you do have some reasoning that it is correct, the idea of a proof system is to let you write down the reasoning in a way that it can be mechanically verified.