system
Given the following post, respond as if you're commenting on Reddit:
human
[doctor who] the time lords may be dead but how come the doctor doesn't come across old ones.

the doctor in the new series only ever seems to come across the master. why doesn't he ever come across timelords that are from before they all died. surely there are some here and there that travelled to past the point of the destruction of Gallifrey.
gpt
You don't wipe someone out in a time war by just killing them, leaving their past selves free to get revenge tomorrow. You wipe them out by erasing them.

Casualties in a war between time travellers aren't dead. They're *gone.*