Indeed it is a matter of opinion. Much like the cliché "the internet is the sum of all human knowledge". If you have deep specialist knowledge in a field that

Indeed it is a matter of opinion. Much like the cliché "the internet is the sum of all human knowledge". If you have deep specialist knowledge in a field that has existed for more than thirty years it can become quite obvious that the internet really in is nowhere near "the sum" of our knowledge.