We would regard our thinking filter which usually responds by "if's" and "but's", everybody would act by instinct and on first thought...I don't think that's such a good idea :-). There are many people out there that are held back from doing crazy things because they have this "restrain".
I believe that we all have some experience in decision making. At some point you learn to make a sound decision from your prior experiences, tell tale signs are always there. Indecisiveness leaves if's and but's, if your heart is really into it and this is what you want ...do it. Don't listen to what other people have to say, 9 times out of 10 they are polluting your thought process which leaves you confused.