Can normal army take out Sphinx pretender?

[sushiboat]

Chazar said:

There definitely some passage inside the manual talking about a penetration chance of x% if fatigue is over y, where I believe y to be 80. However, since I am currently moving I wont have my manual available until 3 more weeks, so I cant check myself.

Here is a passage from page 15:

A high fatigue also gives attackers a chance to find weaknesses in the exhausted unit's armor, reducing Protection by half for that attack.

There is no special treatment mentioned for unconscious units. So, you're right that Protection can be reduced by fatigue, but it doesn't drop to zero.