I can speak French, or at least a 'reasonable facsimile' of French. [=I can speak French but not very well]
Please be more 'reasonable'. There is no way I'll be able to finish all this work in so little time.
We finished within a 'reasonable' [='acceptable'] amount of time.
(..) And you? I ask nothing for myself, only peace in my old age. But I must please the world around me. Michael, your father was a reasonable man. Learn from him. I learned many things from my father. Call a meeting, my friend, so there are no debts or grudges. We will make the peace, you and l. (..)1990 The Godfather Part III
(..) Not to see you disguised by your church. That was a shameful ceremony. I spent my life protecting my son. I spent my life protecting my family! Let's be reasonable, okay? That's your big thing, isn't it, Michael? Reason. - Backed up by murder. - Oh, God. - You hate me. You hate me. - No. (..)1990 The Godfather Part III