>Everyone of my profession (I'm a chemist) has made the experience that usually things don't work in the first place...
You're telling ME? I'm a physicist! :-[)
I assume you're talking about complex biochemical reactions, not the easy inorganic stuff we were given at the university to break us in. Well, would you swear that you have *all* meaningful parameters under control? I daresay you don't: slight temperature variations, pressure, humidity, ambient UV light, a few molecules of some unknown contaminant, you name it... all things that your brain takes in without you noticing it - and afterwards you use that knowledge "coming from nowhere" - maybe taking it as instinctual or superstitious, but it *works*. Is this what you mean?
If so, it's clear to me that it never reached the status of conscious knowledge and as such was never put in words.
Mmmh, science... how often is it just an illusion? Right before Einstein and Planck we (the mankind, I mean) were convinced that the Universe was nearly fully understood, remember? How much is still there that we have first to realize of, then to understand, then to quantify, and eventually to put down in terms of words and symbols? Is there an end to it at all?
Plenty of questions, I know. But I have many more questions than answers :)
Yes, your English is quite good. And, no, it cannot be understood easily - but that's because of the subject and not of the way you expound it.
P.S.: you may write in German if you wish - my laziness will suffer, but it will be well deserved anyway.