Remember when Ford erased Stanley’s mind with the memory gun?

Could someone please help me understand why Ford couldn’t have just put “Bill Cipher” into the memory gun instead of “Stanley Pines”?

Remember when Ford erased Stanley’s mind with the memory gun?

Could someone please help me understand why Ford couldn’t have just put “Bill Cipher” into the memory gun instead of “Stanley Pines”?

LAST CHANCE TO UNFOLLOW ME IF YOU CANT WATCH THE GRAVITY FALLS FINALE: TAKE BACK THE FALLS!!!

AIRS IN 5 MINUTES!!!
I have trouble remembering to tag spoilers!!!!
You have been warned a final time!

Also, special thanks to the followers who can watch it when it airs, and have put up with all my annoying warning messages!

LAST CHANCE TO UNFOLLOW ME IF YOU CANT WATCH THE GRAVITY FALLS FINALE: TAKE BACK THE FALLS!!!

AIRS IN 5 MINUTES!!!
I have trouble remembering to tag spoilers!!!!
You have been warned a final time!

Also, special thanks to the followers who can watch it when it airs, and have put up with all my annoying warning messages!