*the underscore floats them near the top of the folders list for ease of access
             i.e. in:trash from:"Points of Light or in:trash label:Points-of-Light
     repeat all parts of Step Two for any subsequent searches for mail to delete forever
CONGRAT!  now all the emails to delete forever are in Inbox, but also in their own designated label
4)  GET THE REMAINING TRASH OUT OF THE WAY BY PLACING IN _FakeTrash AND Inbox
     a)  go to Trash
     b)  tick the box to Select All
     c)  click link: Select all N conversations in Trash, where N is the number of emails in the Trash
     d)  apply label _FakeTrash
     e)  again, tick the box to Select All
     f)  click link: Select all N conversations in Trash
     g)  click button: Move to Inbox
     *now all the mail you want to keep in the trash are in your inbox but also in their own designated label
5)  DELETE YOUR EMAILS FOREVER... FOR REALS
     a)  click the label _FakeDeleteForever from the labels list on left
     b)  select all emails in the folder, using the Select All tick box-and-link process similarly described above
     c)  click Trash Can button to send them to Trash
     d)  click Trash label in labels list on left
     e)  select all emails in the folder, using the Select All tick box-and-link process
     f)  click button Delete Forever
6)  DARLING, WILL YOU PLEASE TAKE OUT THE FAKE TRASH?
     a)  click the label 
_FakeTrash from the labels list on left
     b)  select all emails in the folder, using the Select All tick box-and-link process
     c)  click Trash Can button to send them to Trash
     d)  click Trash label in labels list on left to verifiy your emails are in Trash
7)  DELETE TEMP LABELS (unless you plan to use this process again in the near future)
     a)  hover over _FakeTrash label in list on left
     b)  when the down arrow (triangle) on the right of the label appears, click it
     c)  when the context menu appears, click Remove label and then click to confirm
     d)  repeat steps a - c to delete _FakeDeleteForever label, similarly
BUTTER MY BUTT AND CALL ME A BISCUIT!   YOU HAVE OUTSMARTED EVEN GOOGLE.
*note: if i select more than ~1500 messages at once, my gMail hangs. that's possibly just my crappy notebook mucking things up, but i can't can say, either way.