Ask HN: How do you say “I don’t know, but I’ll get back to you” confidently?

In meetings im often asked to answer a question or solve a problem on the fly. I hate to do that because it doesn’t give me time to fully think through what needs to be done, the best way to do it, and any implications.

What I try to do is tell people I’ll take a look and get back to them. But I never found a good way to do it confidently, in a way that doesn’t make it seem like I can’t be trusted that I know what I’m doing. Particularly if they want me to do the task in front of them.

Any advice?