If every person on the planet simultaneously made 200,000 phone calls, there would be the same total number of connections as in a single human brain in a day.

This statement is mathematically illustrative rather than literally precise. With approximately 8 billion people each making 200,000 calls, that's 1.6 quadrillion calls. While this doesn't exactly match the brain's synaptic connections (estimated at 100-1000 trillion), the statement effectively illustrates the brain's astronomical complexity in terms that humans can conceptualize.