You seem to accept it as true unless it can be proven to not be true.
Round earthers accept the current scientific
status quo in this instance. Which is that On 12 November 2014, ESA's Rosetta mission soft-landed its Philae probe on comet 67P/Churyumov-Gerasimenko. It was controlled by ESA's New Norcia 35m dish ground station near Perth in Western Australia.
We have no reason to doubt the massive amounts of independently sourced data recording the landing or any other part of the project. We also have actual images captured of both Rosetta's first false landing, and then its second successful landing—which incidentally could only be achieved by the natural gravitational force exerted by the comet on the lander. Why should we be in any doubt? As the naysayer, the burden of proof lies with
you to prove that this mission never occurred.
Warwick Holmes, an Australian avionics engineer who helped build Rosetta, described the mosaic (below) as "one of the most incredible images in space exploration history, after Neil Armstrong stepping onto the moon".
Holmes said it would probably be several months before exact scientific findings are published as the scientists will be spending many weeks processing and examining the plethora of scientific data from Philae and Rosetta over the landing site.