The Logic of Time and Procrastination

Here's an attempt at a logically valid argument:

1. If I procrastinate, then I delay until tomorrow what I should do today.
2. If time is a loop, then I could reach "tomorrow" by travelling forward and backward in time.
3. If I can reach "tomorrow" by travelling backward in time, then anything I
do tomorrow I already did in the past.
4. If I already did something then I did not delay.
5. If I did not delay, then I am not a procractinator.
6. If I am a procrastinator and time is a loop, then I am not a procractinator.

Here's what I assigned for each proposition:

P = I procrastinate
D = I delay until tomorrow what I should do today
L = Time is a loop
A = Anything I do tomorrow I already did
B = I can reach tomorrow by travelling backward in time
F = I can reach tomorrow by travelling forward in time

Here's the argument in (mostly) symbolic logic:

1. If P then D
2. If L then (F & B)
3. If B then A
4. If A then ~D
5. If ~D then ~P
6. If (P & L) then ~P

I'll work up the proof to this later.....