Doctrine is like Jenga

A good friend commented yesterday that Christian Doctrine was like a wall. You can take some bricks out and the wall still stands.

Thinking about this further, perhaps it is more like jenga. You can take some bricks out of a jenga tower and it will stand, albeit precariously. But some bricks support the whole tower and, if you remove them, the tower collapses. But even if you take away too many bricks that are not that important, you still loose the tower.

So, what jenga bricks can you take out of the tower of doctrine before everything comes crumbling down around you?