That's also why it is difficult for me to tell what I've done in the standup meeting on another day. If I tell people I just spend time on "thinking", they will say it is too vague.
If you say "I was analysing the problem, and evaluating different solutions, and weighting the pros and cons, for example, I thought about [insert option A] but I see [insert contra here]. So I also thought about [option B]... I'm still researching in [insert source]". I do not think that should be a problem. Is what I say constantly in our daily's. And of course, eventually I deliver something.