All of the given examples show clear evidence for model 3 over the others. However, as shown in Figure , model 3 is not always the model that offers the maximum evidence for a given dataset. In this example, the particular contrasts within the dataset are those where there is no deuteration difference between the phospholipid head and tail groups. This indicates that it may be possible when partial deuteration is not possible for the model 1 to be that for which there is the greatest evidence.