I found that my sister had always had better judgment than I did despite my training in engineering. I've always thought myself to be calm, collected, and more rational than her. However, I've found time and time again that her decisions led to a better outcome and left her with no regrets. No kind of rational decision making could lead to the decisions she made; all her decisions were made on a whim and with her "feelings". When a serious yet quick decision is upon her, she would get very strong "feelings" which she would be adamant about.
After learning about intuition, I found that she is more capable than I in sensing and understand these underlying "feelings".