Leaders are right a lot. They have strong judgment and good instincts. They seek diverse perspectives and work to disconfirm their beliefs.We make decisions every day - smaller or bigger. One very good LP at Amazon that I naturally tend to follow is "Are Right A Lot". Amazon expects engineers to avoid unnecessary mistakes. Everyone is supposed either to be experienced enough to make decisions using past experience or to use other techniques like deriving decisions from data and design documents (SDE-I, II engineers are terrible writers, though). Ofc, it is also fine to simply discuss something over slack for minor points. This is a significantly useful skill that many of us train each day. If you prepare for an interview, ensure you have a story that exemplifies you approach dealing with ambiguity the right way.