“Therefore I Am” makes us think of the phrase “I think, therefore I am,” which implies that the seventh episode of The Flash Season 4 will have a heavy focus on DeVoe/The Thinker. It is also the title of the November 21 episode of the series!
The CW has released an official description for the episode which you can find below.
BARRY MEETS DEVOE — Barry (Grant Gustin) comes face to face with DeVoe (guest star Neil Sandilands). DeVoe’s past is revealed through flashbacks. Meanwhile, Iris (Candice Patton) puts the final touches on the wedding, which is a week away. David McWhirter directed the episode written by Eric Wallace & Thomas Pound (#407). Original airdate 11/21/2017.