 Almost all the medieval dedicated treatments of obligations proceed through giving rules on how the respondent ought to give the evaluations, or what is to be granted and what is to be denied. The essential rules are based on the idea that each proposition put forward must be recognized as ‘relevant’ or ‘irrelevant’ in relation to the obligation given at the beginning. Thus, if the respondent is given as a ‘positio’ the proposition ‘Plato is running’, the proposition ‘Plato is moving’, and indeed any proposition following from ‘Plato is running’ is to be deemed sequentially relevant. Similarly, any proposition incompatible with ‘Plato is running’ is to be deemed incompatibly relevant: ‘Plato is sitting’ will have to be denied. On the other hand, ‘Socrates is running’ is to be deemed irrelevant at least if it is put forward immediately after the ‘positio’, since there is no logical connection between Plato and Socrates running.