"I think that multitasking between multiple tasks has been somewhat-generally known to not be possible (for most people) for a while now" But what is a task? Y

"I think that multitasking between multiple tasks has been somewhat-generally known to not be possible (for most people) for a while now" But what is a task? You emphasize the term and I have a general concept of what a task is in work and other contexts. But that seems too fluid to make broad statements about human behavior - even with studies combining two activities. How do we know one person's doing a task isn't another person's multitasking? It's intuitively plausible that two activities logically will be somewhat harder than doing each in sequence. But are all such combinations identical? A lot of challenging activities do involve the combination of subtasks - firefighters might break into a building looking for survivors while monitoring the situation of the building for safety. Just about any video involves satisfying multiple constraint simulateously, if they didn't, they'd be boring, etc.