But not the primary part.
If it could be shown that torture could be a very effective way of gathering information, would you be open to changing your mind about it?
I'll put my hand up to this one. I could approve of torture if (and only if):
1. It actually provided highly reliable information in a timely fashion.
2. Those subject to torture were only those who had been shown in a public court, beyond reasonable doubt, to have conspired to commit mass murder and to be in possession of information likely to prevent future acts of mass murder.
3. That anybody shown to have in any way sexed up evidence, lied or misled a court in order to get a torture order would get whatever the torture victim got.
However the problem is that we do not live in a world where any of these happen to be true, or even close to true.
We live in a world where torture is ineffective, where torturers are carefully hidden from public scrutiny by the US government, and where there is absolutely no accountability whatsoever for the crimes these people commit.
Actually, I could get behind torture in one other scenario.
1. The people tortured were themselves either torturers or politicians who protected torturers.
2. Making a horrible and public example of them would deter future torturers.
I'm not sure #2 would be true in the real world though, since the people who commit such crimes generally think they will get away with them and so are not deterred by legal consequences.
In practise, I'm against torture in much the same way that I don't believe in Thor. As a good skeptic I admit that I could conceivably change my mind, but I'm more likely to flip fifty heads in a row while balancing blindfolded on a naked human pyramid than I am to encounter evidence that will make me change my mind.