The separation of logic and creativity

Creatives are good at creative thinking. Some are exceptional logical thinkers too, but most aren't. On the client end, most marketing directors are pure logical thinkers with little understanding of creativity (and rightfully so, that's why they hire creative agencies). Planners are supposed to move around freely in both logical and creative domains. So far so good. What's often a source of conflict and the reason why some good creative ideas don't pass through the client filter, or even internal filters, is perhaps not the idea itself but the decoding of it. And because people have different ways of decoding things, things will very likely to go different ways. When this happens, a good way is to try and separate creative and logical thinking in arguments, processes and deliverables. Combining both in a project group is an art, and when it doesn't work, you'll end up with shitty compromise.