This is a pretty common management strategy to stroke your ego and put you in a elevated position where you awkwardly feel the need to agree. I do the opposite

This is a pretty common management strategy to stroke your ego and put you in a elevated position where you awkwardly feel the need to agree. I do the opposite, I say well it's not entirely clear how much work this is going to take, I'll need to do some initial assessment to get a more accurate idea. If they continue to pressure I ask them what changes they imagine need to be done since they're so assured of the scope and timeline of their request. I have not a care in the world of letting someone else be the "expert." If they are, I'm more than happy to go with their idea. I've yet to get a response back outside of a collaboratige conversation with another developer working on the same codebase for similar efforts. This is usually where people realize just how much ignorance they have around their request and that they should leave it to the people more familiar with the work to make accurate assessments.