Category Archives: deontic

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Dealing with the logic of prescriptions can be hard…

…because it is so difficult to determine whether they have a truth-value. This point is acknowledged in the contemporary debate on deontic logic:

A fundamental issue of deontic logic is Jorgensen’s dilemma, as noted by Jorgensen. On the one hand, there are inferences involving norm sentences such as ‘you should stay‘ or ‘you may leave‘ in our lives; therefore there should be a logic dealing with them. On the other hand, these sentences express orders or permissions and do not have tuth values: therefore, there cannot be such a logic. A dilemma arises. (Ju and Liang 2015, section 1)

Out of probably similar reasons, also within Indian philosophy almost no school focused on the logic of prescriptions. Even within the only one which did, Pūrva Mīmāṃsā, some authors then moved back towards the safer ground of understanding prescriptions as descriptions. Again, in the words of Ju and Liang:

To solve this dilemma, many philosophers have proposed a distinction between two different uses of norm sentences: descriptive and prescriptive uses. In the descriptive way, norm sentences are used to state what agents ought to do; they can be true or false. […] Deontic logic is ‘legalized’ in this way. (Ibid.)

In this sense, trying to “legalize” deontic logic is a way to deal with it and to attribute truth values to it. Kumārila went a little bit in this direction when he stated that prescriptions refer to the future (which is still beyond the precinct of application of truth values, but not as much as the deontic domain, which will never be). Maņḍana went much further and claimed that, e.g.,

O x / you desire y (“You ought to do x if you desire y”)

is tantamount to:

x is a means to realise y

Why so? Because of the dilemma mentioned above, but probably also because Maṇḍana was in part closer to Vedānta than to Pūrva Mīmāṃsā and was in this sense keen to avoid the commitment to sādhyavākyārthavāda, i.e., to the theory according to which all sentences can only convey a prescriptive meaning.

I am grateful to Bama Srinivasan, who sent me a copy of Ju and Liang’s article.

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175th Philosophers’ Carnival

The 175th Philosophers’ Carnival is ahead of schedule, here. It links to interesting posts, mostly on epistemology of testimony, philosophy of language, modal logic, ethics and theology, which are all more or less my favourite topics. Thus, I guess I should not complain about the lack of diversity in the posts mentioned.

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Again on circumstances and desires

According to Mīmāṃsā authors, prescriptions do not apply sic et simpliciter to anyone. They apply to a selected group of addressees, who are identified through a nimitta ‘condition’. Accordingly, the standard form of a prescription is:

(A) The one who is desirous of heaven [substitute ‘heaven’ with any other goal] should sacrifice with the Darśapūrṇamāsa [substitute ‘DPM’ with any other goal].

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Necessity in Mīmāṃsā philosophy

Anand Vaidya has recently raised a very intriguing discussion on modality in Indian philosophy. His post started with the suggestion that modality is less central in Indian philosophy than it is in Western thought. In the comments, several scholars suggested examples hinting at reflections on modality also in Indian thought but, now that I think again about them, they mostly discussed the modality of possibility in Indian thought. What about necessity?

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A pathway through Kumārila’s Ślokavārttika, śabda-chapter, part 1

The chapter on śabda ‘language as instrument of knowledge’ within Kumārila’s Ślokavārttika is an elaborate defense of linguistic communication as an autonomous instrument of knowledge. Still, its philosophical impact runs the risk to go unnoticed because it is at the same time also a polemical work targeting rival theories which we either do not know enough or we might be less interested in, and a commentary on its root text, Śabara’s Bhāṣya on the Mīmāṃsā Sūtra. The chapter has also the further advantage that all three commentaries on it have been preserved. Thus, beside Pārthasārathi’s useful one, one can benefit also from Śālikanātha’s deeper one and from Uṃveka’s commentary, which is the most ancient, tends to preserve better readings of the text and is philosophically challenging.

The following is thus the first post in a series attempting a pathway through the chapter:

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Deontic logic applied to Sacred Texts

I discussed already in several previous posts a project on the application of deontic logic to the understanding of the Mīmāṃsā exegesis of the Vedas. Now, the project leader, Agata Ciabattoni, made me ponder about a question I should have considered long ago, namely whether someone else has been applying deontic logic to other Sacred Texts.

At first sight, I would have thought that this would have certainly been the case, given that Sacred Texts are, at least in part, prescriptive texts.

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Are we sure we are appealing to “common” sense and not just to “English common sense”?

How much of our philosophical ideas are in fact conditioned by the language we use?
You can read, for instance, these critical comments on the Ten Commandments and their form in Hebrew. One way to avoid the risk of mistaking the appeal to one’s intuition with the appeal to one’s working language, is to test one’s ideas within different cultural milieus (see, in this regard, this post).
On a related vein, you might want to check this and similar posts by Gabriele Contessa on the need for Analytic Philosophy to welcome more scholars not having English as their mother tongue.

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Do Mīmāṃsakas think that one “Ought to sacrifice”, or that one “Ought to sacrifice, given the condition x applies”? UPDATED

I am currently working with some amazing colleagues at the Vienna University of Technology on the formalisation of Mīmāṃsā deontic logic (for further information, read this post). One of the problems we are facing is that duties prescribed in Vedic prescriptions appear to be interpreted as regarding only specific eligible people, the adhikārins. For instance, one needs to perform a Kārīrī sacrifice if one desires rain, so that the duty to perform it does not apply generally to all. Even in the case of a sacrifice one has to perform throughout one’s life, such as the Agnihotra, the same restriction applies, since Mīmāṃsā authors interpret it as meaning that one has to perform it if one desires happiness, i.e., throughout one’s life, since one always desires happiness.

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What do I obtain if I refrain from eating onion (and so on)?

In the case of the Śyena and the Agnīṣomīya rituals, violence is once condemned and once allowed, causing long discussions among Mīmāṃsā authors. Similarly, the prohibition to eat kalañja, onion and garlic is interpreted differently than the prohibition to look at the rising sun. Why this difference?