Sure it does. Imagine there’s a cave you can’t enter. You can send other people in, though. You send someone in and they tell you there’s a lion in there. You send someone else, they also say there’s a lion. You send a thousand people in and they all say there’s a lion. You send in people you’re certain have never met each other and they say there’s a lion. You send in people from cultures that haven’t contacted each other and they still say there’s a lion. You send in people who have no idea what a lion is and they say there’s a strange animal in there and the description matches a lion.

Put it all together and you have objective evidence that there is, in fact, a lion in that cave.