Please answer

Saad has weak taste buds. He consumes his lemonade with sugar. He prefers a less sweetened glass of lemonade. However he cannot taste differences in sugar if it is greater than or equal to 1 tea spoon. (For example: if Saad gets a cup of coffee with 1 teaspoon or 2 teaspoons, he cannot tell the difference). Are his preferences transitive? Use example(s) to explain