When Linus reimplemented UNIX, writing the Linux kernel, the situation was somewhat more complicated, with an additional layer of indirection. He was exposed to UNIX just as a user, but, apparently, had no access to the source code of UNIX. On the other hand, he was massively exposed to the Minix source code (an implementation of UNIX, but using a microkernel), and to the book describing such implementation as well. But, in turn, when Tanenbaum wrote Minix, he did so after being massively exposed to the UNIX source code. So, SCO (during the IBM litigation) had a hard time trying to claim that Linux contained any protected expressions. Yet, when Linus used Minix as an inspiration, not only was he very familiar with something (Minix) implemented with knowledge of the UNIX code, but (more interestingly) the license of Minix was restrictive, it became open source only in 2000. Still, even in such a setup, Tanenbaum protested about the architecture (in the famous exchange), not about copyright infringement. So, we could reasonably assume Tanenbaum considered rewrites fair, even if Linus was exposed to Minix (and having himself followed a similar process when writing Minix).
In words, l_i(x) is constrained to 1 at and to 0 at
vt: Report color scheme events are now reported synchronously. #5922。新收录的资料对此有专业解读
第一类人是明明不无辜，但认为自己无辜，这一类人我们不选。还有一类人是他不无辜，但他深刻理解和知道自己并不无辜，这一类人会被我们选为描述的主体，描述他在这个历史时期确实不无辜，并且承认自己不无辜。，推荐阅读新收录的资料获取更多信息
mentioned this pull request。关于这个话题，新收录的资料提供了深入分析
what knobs I turned. Until I was able to find the culprit.