With a Scottrade "CASH" account, that is a good clear reading of the rules.
I buy and sell during one day, and use funds from a sale earlier in the day to buy a different stock that same day.
The 3 day settling period is strictly if you want to have cash sent to you.
Step aside son, you're blockin' the MOMO!
Disproving absence of evidence should be easy, show the evidence of.