The ranking Democrats are inoculating themselves against torture charges by claiming that being informed doesn't mean that are complicit with the torture policies. They are claiming that they couldn't say anything about what they knew because it was classified.
Since when has that stopped anyone in Congress in the past?
Is accepting this line part of the price we are willing to pay to get the U.S. Government willing to have an investigation into the Bush Administration's torture policies? That's what Pelosi is hoping for.