system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] If Dr Strange used the Time Stone to see all the various timelines, how come he didn't know what Thanos looks like?
gpt
Of course he knew what he looked like.  His opening line was designed to set the right tone for the encounter.

In his 14 million attempts he tried everything - being conciliatory, demanding surrender, surprise attack, etc.  The greeting he used was the one where he saw victory.