Final answer:
The inability to simultaneously make sense of all alternatives, generate new ideas, or remember thoughts during a brainstorming session is known as blocking, a type of memory lapse also known as the tip-of-the-tongue (TOT) phenomenon.
Step-by-step explanation:
The problem experienced by group members during a brainstorming session when they cannot simultaneously make sense of all alternatives being generated, think up additional alternatives, or remember what they are thinking is known as blocking.
Blocking, also referred to as the tip-of-the-tongue (TOT) phenomenon, is akin to knowing that you know something but being temporarily unable to retrieve the information from memory.
This experience is not limited to brainstorming sessions but can occur in various situations where recall from memory is required.
It's an example of the type of memory lapse that everyone experiences from time to time, such as forgetting the name of a well-known actor despite being able to picture them and remember other movies they've starred in.