What I'm talking about here is that there's choreography that seems fairly inevitable - if you're going to circle left into a half-poussette isn't the probable direction of the half-poussette pretty obvious, or if you did a clockwise half poussette into a mad robin why should you even have to use a role name to say who goes through the middle first? Getting it wrong requires fighting your momentum - and some people will do that. [Although if they're generally tentative, or late, or executing one call and stopping and then executing the next call, then they don't have appropriate momentum anyway.]
-- Alan