The erosion of academic writing continues:
“Several media queries can be combined in a media query list. A comma-separated list of media queries. If one or more of the media queries in the comma-separated list are true, the whole list is true, and otherwise false.”
Source: W3C Media Queries
Come on, World Wide Web Consortium, I expect better writing out of you. Who let that incomplete sentence through? Can you rewrite this to be a little more clear? Try this:
“Several media queries can be combined into a comma-separated list. The list is evaluated as true if at least one of the media queries is true, otherwise it is evaluated as false.”
This is why browser vendors take vastly different interpretations of the standards.