If you have a boss like that then you could always form a habit of saying the "if" part first. If we just deal with the issue of X and solve the Y problem, the

If you have a boss like that then you could always form a habit of saying the "if" part first. If we just deal with the issue of X and solve the Y problem, then yes, we can most certainly do it. I have some ideas on how to deal with X and I think that if we bring Marketing into the discussion then we should be able to make a plan to address Y. The above paragraph is still "can do" and it is arguably a better way to answer such questions because it is not as easy for a listener to misinterpret it.