Thanks Kenny I am no stranger to intuition. I find it quite embarassing at times. I often have an intuition that something is wrong, but do not know why. Only later do I work out the real reason why I know. Then it is very clear how my subconscious mind reasoned it out. This also happens on these forum discussions. Someone writes something that I know is a load of total garbage, but I am not sure why. Later, when my mind works it through, it will seem obvious and simple. Scientists have intuitions. The more highly trained and experienced the scientist, the better the intuitions. But they all come from data. A good intuition is just reasoning from good data at a subconscious level. There is, of course, bad intuition as well. A bunch of researchers some years ago were working on how interviewers used their intuition to determine which candidates were good and which were bad. Rather to their horror, they discovered that intuitions closely followed prejudice, such as racial prejudice or anti-semitism. In these cases, the intuition used invalid data. This is also a good reason to use scientific testing after hypothesis formation. Indeed, it is essential.