Hookeroak

Good answers everyone.
When I made them up, these are the anwers I had in mind, but certainly some of these other anwers are just as good.

1) The Tree was a Twin Trunk.

2) The tree was grown indoors, with artificial grow lights.

3) The student lives in the southern hemisphere, the master in the northern hemisphere.

4) Grafting techniques: Bud begins, grows into a branch, the branch is grafted onto a younger trunk (of a different tree), the trunk onto a younger base (of a different tree), with years passing between each process. Not likely, but possible.

Regards,
Scott.