Choices are a Mirror
Is choice a mirror to our natural inclinations?
Giving choice to people is the best and easiest way to find out about their natural inclination and character. This is as true in professional life as it in personal life.
Even small actions that people take (or not) when the believe they have free choice speaks much louder than words. Often, it can be an inexpensive way of finding out who can be relied upon and to what extent, before you decide to take your partnership/ collaboration forward.