Your question is Resolving Design Feasibility Conflict. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time a software engineer told you your design was not feasible to implement. How did you handle the disagreement, what trade-offs did you work through, and what was the final outcome for the user experience and the team?