One thing I've noticed over the last couple decades in the business is that some people--in fact, some entire organizations, aren't wired the same way I am. When I have an idea or make a suggestion, these entities immediately say no. They don't even hear or consider what it is I've proposed.
Then after 48 or 72 hours or even a full week later, through some set of circumstances, the idea is played back to me--most often as if that idea was someone else's thought to begin with.
These people aren't evil, dumb or anything else.
They're just slow listeners.
It takes them a long time to hear.