“The tragedy of our predicament when we are within ideology is that when we think that we escape [from] it into our dreams, at that point we are within ideology,” says Slavoj Žižek in THE PERVERT’S GUIDE TO IDEOLOGY—screening here at the Brattle over the next week. This is precisely the predicament of Travis Bickle, the wayward, psychopathic hero of TAXI DRIVER. Betsy (Cybill Shepherd) has it right when she says Travis is “a prophet and a pusher, partly truth, partly fiction. A walking contradiction.” Travis is a cultural observer at odds with the ideologies in which he participates.