The Partisan has a lower, more limited hand size than the conventional force. While the basic rules tell you that you refill your fate cards up to the hand size limit at the beginning of a turn, they don't mention if the hand size of the Partisan can be exceeded or not. Are they required to be discarded at the end of a turn down to the hand size limit?
Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure.
The basic rules say nothing of the sort. Players draw up to their maximum hand size at the *end* of each of their turns (rules 1.1 and 5.4). Partisans are no different, except for their smaller hand size limit.
And the knife action can never cause the Partisan player to exceed his hand size: you draw one card for each card played.