Citing removed web pages.
Suppose an article is written and cites few web pages to make a conclusion. Years later, those web pages are no longer accesible, not even via waybackmachine.
In these conditions, does the conclusion hold any scientific value? Because now the presumptions from those web pages can no longer be verified (since those pages are inaccesible).
And as a last question, if the web pages aren't accesbile via waybackmachine, but screenshots of those pages exist, along with the content referenced in the article, does the conclusion have a scientific value? What if those screenshots are fake?