No Rosa, the hypothesis is clearly false. Why I believe it is false is because it is so ridiculous that it no one could reasonably assent to it. You say I dont 'know' that. But that is not the relevant concept. Knowledge as distinct from reasonable assent is a purely philosophical device. Its ideology. There can be no basis for this distinction that has any relevance to Marxism. So the reason I wont make the distinction between reasonable assent and knowing, is that that is a useless distinction when talking about the world. Read your own comments on scepticism !!
"Dixi et salvavi animam meam" - quoted by Marx
"Things rarely work out well if one aims at 'moderation'..." - Engels
"By and by we heare newes of shipwrack in the same place, then we are too blame if we accept it not for a Rock." Sir Philip Sydney
"The most to be hoped for by groups who claim to belong to the Marxist succession (...) is for them to serve as a hyphen between past and future....nothing can be held sacred – everything is called into question. Only after having been put through such a crucible could socialism conceivably re-emerge as a viable doctrine and plan of action." - Van Heijenoort