hmm dumb or just lying

mccain recent 'statement' concerning contraception. Didn't want to answer because:

1. Couldn't remember his vote
2. Didn't know what the religious zealots wanted him to say ( no funny lump on his back for communications I guess)
3. Couldn't think clearly (due to age, or something else?)
4. Couldn't remember what georgie would do?
5. Something else?

Which is worse?