What can I log as XC time?

Andrew Sarangan wrote:

The question was whether he can log XC time when flying locally (ie take
off and land at the same airport). It doesn't matter whether that
airport happens to be his normal home airport or not. If you do not land
at a point farther than 50NM from where you took off, you cannot count
that as xc experience for most ratings.

That wasn't really my question. My question, phrased
differently, was: what is an "original point of departure"
under 61.1's definition of "Cross Country Time" used "for
the purpose of meeting the aeronautical experience
requirements."

You seem to imply that either (a) landing, or (b) staying
overnight or (c) staying multiple nights changes your
original point of departure.

In question (a) I wondered if I could keep my hangar airport
as my original point of departure for a week long trip to a
50+ nm new location near my place of residence.

Ini (b) I wondered what happens if I'm flying a long XC to
Oshkosh or California, but don't manage 50 nm of progress
some days. Is the entire flight loggable as XC?

To put this into context,

1) It's pretty clear that simply landing does not reset your
OPOD, so you can get gas 25 nm out on a 50nm+ flight and log
all of it.

2) The FAQ says the student could get stuck for a few days
due to weather, and still log all of the time without
changing his OPOD.

3) The FAQ also says a student can even fly 26 nm south "for
the purpose of repositioning the aircraft" call that airport
his new OPOD then fly 50+ nm north (but only 25+ north of
his first airport) and log THAT as XC.