It is believed that this expression came from the proverb: "Grandmother was wondering, but she said in two ways: either rain or snow; either it will happen or it won’t." The fortune teller is the same elderly woman who could decipher the meanings of cards, laying them out, suggesting two scenarios for the development of events. For example, love - not love, come true - not come true. For example, one of the variants of this expression sounds like this: “Baba vorozhila, nadvoye polozhila” ("Grandma cast a spell, she laid it in two.") The expression "Grandma said in two", however, is used with a certain degree of irony: after all, such predictions have an accuracy of no more than 50 percent.