Z:gnu-www-ja-free-encyclopedia--e2d1b5-When a topic ought to be cover/en

When a topic ought to be covered in the encyclopedia or with a course, but it isn't, we must make sure we don't forget that we have a gap. The exclusionary rule will remind us. Each time we think of making a link to the unacceptable page, and we stop because of the exclusionary rule, that will remind us that someone ought to write another page about the same topic&mdash;one that is free enough to be part of the encyclopedia. Eventually, one of us will do the job.