You have no problem stepping in temporarily, but work out an exit strategy ahead of time. You don’t want to be saddled with a responsibility indefinitely.
Point out to the other party that your views aren’t necessarily in disagreement. It’s just that you refuse to have words put in your mouth.
Colleagues seek input. This is proof positive that you have something to say and you should feel more confident about your opinions.
You may be hitting a sore spot without knowing it. Instead of repeating what you just said, back off and let this person come to you.
It’s amazing how you and somebody you just met can be on the same wavelength. Whether this is thrilling or creepy depends on your mood.
The more you question, the more flustered a superior gets. Ask yourself is this really getting you anywhere? You don’t want to sow the seeds of future resentment.