During the last presidential election, many liberals said, "If you didn't vote, then you helped Donald Trump win."
What they mean, of course, is that you should have voted for Hillary Clinton, which would in fact have hurt Trump's campaign.
However, a republican could use the same argument: "If you didn't vote, then you effectively voted for Hillary."
So, if you didn't vote, then you voted for Hillary and Trump both?
Is there a name for this fallacy or type of reasoning?