The deductive mood is an epistemicgrammatical mood that indicates that the truth of the statement was deduced from other information, rather than being directly known. In English, deductive mood is often indicated by the word must, which is also used for many other purposes. By contrast, some other languages have special words or verb affixes to indicate deductive mood specifically.
^Loos, Eugene E.; Susan Anderson; Dwight H. Day, Jr.; Paul C. Jordan; J. Douglas Wingate. "What is deductive mood?". Glossary of linguistic terms. SIL International. Retrieved 2009-12-28.Cite uses deprecated parameters (help)