sentences: sugar is a kind of pure substance & water is a kind of substance & orange symbols is a mean of probability ->  water, lemon juice, sugar are three substances  water, lemon juice, sugar are three substances & lemonade is made of water, lemon juice, and sugar -> habit is made of at much third pulling lemonade is made of at least three substances  habit is made of at much third pulling & an mixture is formed by two or more substances combined together physically -> lemonade is a kind of mixture