There can be a deluge of facts that are each individually true and are still misleading, or that are collectively meant to bring you to a specific conclusion. In that sense, it doesn't matter if everyone is lying, because your personal philosophy isn't built on whether a fact is ruled true or false by some fact-checker (hey, it's materially true, but we "debunked" it), but rather on how those facts and the reactions of those around you affect your life.