prohibiting minors from accessing obscene material online

it is not clear what exactly constitutes “obscene” or “sexually explicit material.”

If one scientistor a group of scientists invents a new instrument, they must demonstrate persuasivelythat the instrument does or means what they say, that it represents the kind and order ofphenomena they intend. Other scientists start using the instrument, and ideally, its gen-eral acceptance soon helps to make it a transparent fact of scientific practice. Now scien-tists everywhere use the air pump, say, or the electrophoresis gel without thinking aboutit. They look through the instrument the way one looks through a telescope, without get-ting caught up in battles already won over whether and how it does the job. The instru-ment and all of its supporting protocols (norms about how and where one uses it, but alsostandards like units of measure) have become self-evident as the result of social processesthat attend both laboratory practice and scientific publication.