I saw him coming up the wrong way on a one-way street in the bike lane. There was not enough room for two bikes, and I did not want to veer into traffic, so I maintained my course and just slowed down to <8mph. I assumed he'd get off the road since he was in the wrong. Well, we clipped handlebars. I was ready for it, and rolled through unaffected, but he ended up over the bars on the ground.
I stopped and turned around.
"Are you ok? I hope you are ok, but you were going the wrong way" I said.
"It's a bike lane. You can go either way." he said, looking very agitated.
"You're wrong. You can only go one way."
"No, you're wrong. You can go either way."
"You're right that it is a bike lane, and you can go this way, but not that way. I hope you're ok."
With that I left since the conversation was obviously leading nowhere and he seemed to be fine, and was more interested in his theory about bike lanes than any pain or injury. I actually shortened it, but you're not missing anything. Is there anything one can do in these cases to convince the other party of the law, other than just hitting him again next time I see him?
This is one of the problems with bike lanes. They create confusion since they are a special class of lane. There would have been no doubt (I hope) if there had been no bike lane on the street.