Cách sử dụng
The expression "heads or tails?" is commonly used when flipping a coin to make a decision. Before flipping the coin, one person will ask the other person to choose "heads" or "tails." After the coin is flipped, if the side that lands facing up matches the chosen side, the person who chose that option wins. This expression can also be used metaphorically to mean a decision needs to be made and both options are equally likely to occur.