Debate & Reasoning in Tibetan Buddhism discussion

What is the difference between the two, Cause and Substantial Cause?

There are Three Possibilities.

It follows that there are not Three Possibilities. Posit something which is both.

(are we going long handed old school style?)

There is something, the subject, this computer in the former moment.

(we can do it however. i guess old school style. i need to practice so i don't forget.)

It follows that the subject, this computer in the former moment, is a Cause.

(sounds good)

I accept it.
(Spell out your answer "I accept it.")
I accept that this computer in the former moment is a cause.

Why do you say that the subject, this computer in the former moment, is a cause?

Hi, can I revive a ten-years old post?
I am not proficient in the formal way debate is conducted, but I will try to do my best.

The subject, the computer-from-ten-years-ago, is a cause, since it was transformed to the computer-in-the-garbage today.