Well... I figured you were in phillology. :) You end up your carreer were I started, lol. Once I got out of the Navy, I was a program and network analist and programmer for a short while. I Studied Mechanical Engineering at the University, which is to say Lots of Physics and then, I took a leap into Dental Prosthetics, did that and now I am a PhD in it. I stopped following mathematical models a long time ago. From my days in Naval Officer's School, I retain a lot of my communication models, leadership and situational analisys learnings. Psychology was also a thing in Medical School, but most of all, I am self taught in a lot of issues. I guess I now know were your filter definition comes from... We were talking of different things. Thanks for letting me know this. Although I already suspected it, it actually turns out to be good to have a minimum information about the other. It will help in a better selection of the words to use.
Have a great day.
Cheers.