If you have a home built from lumber, can you determine
which was the first stud in your home?

Yes. I built my own home and know exactly which studs were put up first.
It's the wall directly behind me. I have photo's and time lapse video in
case I forget.

However, a stud is just a board until the wall is vertical (that same board
would be a joist in your floor, or a rafter in your roof). Since most walls
are assembled as a unit on the floor and tilted into place, there's really
no single stud that is "first". In my case, I know the first SEVEN studs
that went up first. I built walls in eight foot sections.

Of course, I don't know what this has to do with anything, or why it would
matter.

Anthony