Four noble truths, any single being of mankind can invent, find the new truth other than that?

Gautama Buddha found the traditional path of previous Buddhas and spoke about "The four noble truths". Nowadays, people cannot talk about/discuss the truth or falsehood of idea/notion/philosophical/religious entity. Did the current generation lose the ability to judge/determine/conclude the truth or falsehood of idea/notion/philosophical/religious entity? Or do we universally accept the idea that not a single living being be able to find/invent/prove that the new truth about the entities? Do we really have to remove the words truth and false from our dictionaries since we are not allowed to use in anywhere else?