[bjterry]

It's trivial to memorize an entire sonnet. Actors and actresses memorize many times that amount. It's also trivial to write a sonnet. How many bits of entropy do you think a sonnet has?

[sparkinson]

Are you saying that you are happy to type in an entire sonnet when prompted for a password?

Being realistic, to expect someone to type in such a long password regardless of if they can remember it or not is clearly unreasonable.

[robertfw]

For a consumer, perhaps, but for protecting thousands of individuals...