I can prove the facts I have detailed. You cannot because mere allegations, opinions, and story lines are not proof of anything.
However, there are two big problems with the narrative presented by Trump and Giuliani, according to activists in Ukraine and others.
For one thing, Ukrainian prosecutors and anti-corruption advocates who were pushing for an investigation into the dealings of Burisma and its owner, Mykola Zlochevskiy, said the probe had been dormant long before Biden leveled his demand.
"There was no pressure from anyone from the United States" to close the case against Zlochevskiy, Vitaliy Kasko, who was a deputy prosecutor-general under Shokin and is now first deputy prosecutor-general, told Bloomberg News in May. "It was shelved by Ukrainian prosecutors in 2014 and through 2015," he added.
Activists say the case had been sabotaged by Shokin himself. As an example, they say two months before Hunter Biden joined Burisma's board, British authorities had requested information from Shokin's office as part of an investigation into alleged money laundering by Zlochevskiy. Shokin ignored them.
Kaleniuk and AntAC published a detailed timeline of events surrounding the Burisma case, an outline of evidence suggesting that three consecutive chief prosecutors of Ukraine -- first Shokin’s predecessor, then Shokin, and then his successor -- worked to bury it.
"Ironically, Joe Biden asked Shokin to leave because the prosecutor failed [to pursue] the Burisma investigation, not because Shokin was tough and active with this case," Kaleniuk said.