I first noticed this phenomenon during the presidential debates, and it happens when you give a microphone to a lefty and ask him a question. Kane is the one who really got me to notice. Basically, lefties are loaded with lefty talking points, and these talking points are loaded up under high pressure. When you ask a lefty a question, it is like opening the floodgates! Random lefty talking points spew out rapidly, and they don't even need to relate to the question asked. Because these talking points are under pressure, lefties can squeeze out 4 or 5 unrelated talking points before the debate is halted for reorganization. Kane was able to release a dozen of them at a time, every time he was asked a question, but then he is a professional lefty.
I see something similar that happens on this forum. When I post a thread that challenges lefties, the replies are not connected to the OP. They are lefty talking points that are under pressure, although not as much pressure as the professional lefties have. The lefty talking points are just as random though, and they are posted in lieu of an appropriate response that is connected to the OP. It is like squeezing the handle on a hose nozzle. As long as the hose nozzle is open, unrelated lefty talking points flow at a high volume until the handle is released.