Old World philosophers, what do you think is the point of wanting to know knowledge already known to humans, and with no new knowledge

We must repeat recalculate and record to analysis again. Unless the observations can be reproduced and reaffirmed. The only reasonable conclusion is our assumption were errored. Therefore unless it can be recreated repeated and affirmed technically we dont know what happened already. How would we even speculate what the future holds? Given we havent reconfirmed the past?