There is uncertainty( as an intrinsic element of each phenomena) which is a part of nature, and usually out of control, but understandable. There is another factor which is risk (calculated and under control in your decision making process). I think even emotional moves should be put under risk not uncertainty. These are two different things. It's doable to minimize risk but not totally get rid of it. There are others events or phenomena based on emotions which affect your rational thinking too, so you see sometimes your rational decisions are made and affected by not necessarily other rational events. In this case you need to be aware and incorporate it into your risk profile. Another thing is to have vision, and see where the trend and future is going,and have a sense of it ( news, politics, etc..). One for reality is to predict the future and as it's impossible it cannot be necessarily projected in your "right now" moment for decisions.. (talking about uncertainty). We only can prepare ourselves by what to expect for.