Quote:

However, I am not aware of undefinable or improbable factors in physics.



exactly!!! Nothing, even in Einsteins view was undefinable. if it can be messured or observed, so his arguments against quantum theory. if an unknown has a limits, then how can it be undefinable, by definition of "definition"?

SO anything that can occur, be encountered, experianced HAS to be definable ( even if at first we don't understand it). If we elminate all the definables and still have SOMETHING left over, we want to call it undefinable. But in truth its definable, because we know it is there. We know soemthing is there because we compair everything we encounter to our many messuring sticks. Its bright, dark, tall, small, round, square, fast, slow.......
alerady we are defining the undefined...

we just having assigned an identity to the grouped definitions. Factors of the 4thD are the areas of confusion we have no yardsticks to messure them by, so we also lump them into the 'unknowns'.

So if we can identify all the known defintions what is left over is the undefined 4thD defintions. The definitions that fall out of the scope of Natural Laws of the 3rdD but fall under the natural laws of the 4thD. And then accodring to Einstein we should beable to then identify these unknown 4thD defintions ( with scientifc methodology of observation, compairson, exeramintation etc....) untill we DO have those messuring sticks for the 4thD

Relativity is just a steping stone in the process of elimination