All data is, by definition, historical. It tells us what has already happened, not what will happen next. When it comes to DEIB, there is often an expectation of an impossible standard of proof: that we can demonstrate with absolute certainty and predictability that an initiative will succeed before the work even begins. This expectation ignores the reality that cultural change cannot be measured or guaranteed in advance in the same way as financial investments. The question leaders need to ask is this: What happens when DEIB is treated as discretionary and easily replaced by short-term financial considerations? What is the long-term cost to trust, belonging, innovation, and organisational resilience?