[Icehouse] Discard and Draw in Zark City

[Tom Phoenix]

Zark City looks like an intriguing game.

    http://www.wunderland.com/WTS/Andy/Games/ZarkCity/index.html

The description of Draw, on the PDF, says, "Discard any cards you
don't want, then draw three cards. You can never hold more than six
cards."

How many cards, if any, must be discarded before drawing? May a player
with five cards choose to discard one and draw only two new cards, for
example, or does that player discard one, then draw three and discard
one of those? May a player ever discard zero cards before drawing?

--Tom Phoenix