Devs: Feature A is done! Faster than planned even.

Manager: Hmm... what about feature A+B?

Devs: That requires feature B, and you said that feature B was not as important as feature A during our last meeting, remember? So we planned to do A, B, and then A+B. It's there in the meeting minutes.

Manager: But feature A does not make sense without feature A+B. Let's not release feature A just yet until we have feature A+B.

Then why didn't you say so during our last meeting?!