Android :: AlarmManager And BootReceiver

I think I'm reading some conflicting statements about the AlarmManager on the Android docs website. The following statements both exist on this page:

http://developer.android.com/reference/android/app/AlarmManager.html

[at the top]

"Registered alarms are retained while the device is asleep (and can optionally wake the device up if they go off during that time), but will be cleared if it is turned off and rebooted."

- and -

[under setRepeating()]

"This alarm continues repeating until explicitly removed with cancel(PendingIntent)"

So, the question is, do I need to register a BootReceiver that re-sets my Alarms when the phone turns on. The first statement makes me think I do, but the second statement is worded in a way that would lead one to believe that it would live forever, unless a cancel() call on that Intent is called.

So, which statement do I believe or am I misinterpreting one of the statements? I suppose when the power is turned off or back on, Android itself could call the cancel() function on all alarms. I guess it would help if it said that after the second sentence.