Anvaya refers to the logical connection of words, as to how different words relate with each other to convey a significant meaning or idea. Literally, Anvaya (Sanskrit: अन्वय) means - positive; affirmative or nexus; but in grammar and logic this word refers to - 'concordance' or 'agreement', such as the agreement which exists between two things that are present, as between 'smoke' and 'fire', it is universally known that - "where there is smoke, there is fire". However, this word is commonly used in Sanskrit grammar and logic along with the word, Vyatireka, which means - agreement in absence between two things, such as absence of 'smoke' and 'fire' - "where there is no smoke, there is no fire". Anvaya-vyatireka, is the term used by the Buddhists and Hindu logicians as a dual procedure - to