You "cover" evidence when you want to hide something. We literally did the opposite, by inviting the US to count our Vipers. Then the FP article came. When India countered that the State Department or the Pentagon did not "confirm" any such count, the The Washington Post article reminded India that they didnt "deny" it either, basically sealing the case shut. I heard Michael Kuggleman (a pro-India US analyst) defend FP article on an Indian news channel, telling the anchor that the writers of the FP article are credible, FP itself is credible, and the US has no reason to support Pakistan here. Especially since John Bolton approved India's operation in Balakot which WP confirmed later. If you think that after all of this that somehow India's claim of a Viper kill will somehow be magically vindicated in the future, you are dreaming.