What is the theory behind the 9-minute snooze alarm?

[jimmyrocks]

this has a good list of various explanations:
The Straight Dope: Why does the alarm clock snooze button give you nine extra minutes, not ten?

[Guadalupe Ramirez]

How do you shut off the guardian alarm system because it beeps every 30 seconds and it does not let me sleep well.

[Peregrine]

What is this alarm clock thing you speak of? Is that like the app on my phone that wakes me up?

[tangelag]

For some reason I find the 9 minute snooze irritating!

[hitpausebutton2]

Need a extra min to find a hammer? or could be a a 9 min warning during your morning "intantmency" Hey we got 9 mins, as peggy bundy would say,, all i need is 3..

[stanley-88888888]

Originally Posted by Nelly Nomad

3 minutes???

if you know what your doing.