Why Did Susan Rice Write Her Transparently Self-Serving Secret Memo to Self?

Dear Dumb Diary 

From Ace of Spades:

John Hindraker of Power Line says no, she wrote it to protect herself, and throw Obama under the bus, if the need arose.  

He thinks the stuff that purports to claim that Obama wanted things done "by the book" is, of course, pure "company-line" "boilerplate," but the actually important stuff comes after -- the stuff about Obama ordering her not to disclose information to the actual elected president of the United States, Donald Trump.  

In other words, should it come out that this meeting was a conspiracy to subvert the duly-elected constitutionally-invested president, Susan Rice could break out her memo and say "Obama ordered it."  

This makes sense -- Hindraker notes that if all this was was the "company-line" "boilerplate," she wouldn't have had to have made this a secret memo to self -- she could have just made it a routine memo and added it to the file for all to see.

No, she put this memo in a glass box with stenciled writing:  

IN CASE OF CONGRESSIONAL INVESTIGATION, OPEN BOX AND TAKE SECRET EMAIL MEMO TO SELF AND SAY YOU VERE JUST ACTUNG UNDER ZE ORDERS.