Oaths do, if they come from honourable people.

[Which was the catch really. Allen is willing to go to Hell and back if it means keeping one of his promises, but he knows damn well there were people who couldn't care less about keeping the oaths they've made.]

...I can't tell you if you should or shouldn't trust Tyrion, I don't know the man. He may be different from his family, he may not.

Here's hoping, he understands your wariness. That'd be a good sign.