09 июня 2021

Mental exercise #001


Sellers of Turquoise cybersecurity product tell only the truth, sellers of Green product always lie, and the sellers of Red - alternately tell the truth and the lie. One of the sellers calls the Customer: “We have the best cybersecurity product”. The customer, not recognizing the seller by his voice, asks: “Which one?” — “Red”. 


What product should the customer buy?