In the one case, Jerry s probably not invited. In the other case, he s invited, just not expected to bring anything. This step is where you lay out stress patterns. Form affixes and function words. Look at the darn bore task.
People are much more likely to say barn door after the biasing context than bart doard.
So, people probably have an editing function at the end of the plan to check for basic errors. Errors support dividing the plan into these particular steps. Errors support this particular sequence. That planning and production seem to go in cycles. Because it s a hard task, which probably maxes out working memory all the time.