Think of a number between one and ten (or one and a hundred) and you will inevitably pick a fibonacci number. Give it a go. Your nature will overcome your conscious.

I'm not so sure about that. My first inclination is always to pick 7, and that's not a Fibonacci number.

Most successful plots involve three central characters and are broken into three acts or scenes.

I'll agree with the acts and scenes, but characters? Surely there are more successful pairs. Romeo & Juliet for example.

Architects follow onto this by using triangulation to survey and to design.

Maybe somewhat, but we've mainly studied rectangles and circles as being in perfect proportion to the human form.