By Chris Donaldson Whoever is writing Joe Biden’s material doesn’t appear to have a working knowledge of why it is that Americans celebrate the Fourth Of July, or as it is otherwise known Independence Day. On Wednesday, the nation’s 46th president reiterated his tired threat: If people don’t march down to their local vaccination site and roll up their sleeves, that they would not be able to celebrate July 4th. Even to get together in “small gatherings” to commemorate the day