No Brainer means "data analytics results are so certain that they are the sole basis of a decision. In this scenario, I think that a no-brainer was not used when it should have been. In the text, the last paragraph says, "because the engineers only looked at launches with evidence of O-ring distress - they missed a vital connection that became obvious when investigators looked at the temperatures for all 24 launches." I feel as though everyone should have known to check all of the data and not just a select few of them