In this wonderful scenario, which Maniac is the "anti-Maniac?"
I would assume it to be the young Maniac, since he
already existed. His space/time "signature," (his atoms & the such) micro-evolved into old Maniac, thus making his specific past "signature," nonexistant. So, the Maniac in the past is recognized by a negative "signature," in the present...!?
The old Maniac is a product of the young Maniac and if the young Maniac were to interact in the old Maniac's time, then it is the young Maniac who cancelled out the old Maniac.
Thus, making the young Maniac the "anti-Maniac?"
Also, would the overlay occur at eye-contact (direct Maniac interaction) or just by the simple presence of the young Maniac in the present...??