One way vs two way doors
Jeff Bezos at amazon publicised the idea of one-way and two-way doors. One-way doors are said to be the decisions you cannot undo once made, whereas Two-way doors represent the reversible decisions. If something is a two-way door then there is little point spending a lot of time debating the decision. Try it out and see what happens. But if you are unable to reverse a decisions, then you want to spend more time to make sure you are doing the right thing.