Getting drunk often leads to people saying and doing things that they later regret and feel awful about and if it happens on a special day like a birthday it can be even worse
Consider the statement "I got really drunk on my birthday and was horrible to one of my oldest friends, I felt awful ". Based on this "The fact that I got so drunk on my birthday and said some really terrible things to one of my oldest friends makes me feel awful" a true statement? Yes, no, or I don't know?