According to Mīmāṃsā authors, and unlike Nyāya ones, Vedic sentences do not convey the existence of something, but rather that something should be done. This means that the entire Veda is an instrument of knowledge only as regards duties and cannot be falsified through sense-perception, inference, etc. No Mīmāṃsā author, for instance, could ever blame a scientist for reaching a conclusion that clashes with data found in the Veda.