In this case, I think I need to tighten up my hypothetical.
Suppose RH were employed by the entity that installed the red light. He had the traffic light apparatus in his hands, did the final adjustments...tested it...saw that it was working properly. And then entered his car and seconds later...sped right through that same red light and killed someone. Oops, he "forgot" he had just installed a red light at that intersection.
That's a whole OTHER level of forgetfulness.
Suppose someone pours a lethal poison into a milk bottle...and then, seconds later, serves it to his child...And says he "forgot" there was poison in the bottle and thought it was milk.
Suppose some takes his child into the deep end of his family pool...plays with him for 20 minutes and then immediately climbs out and leaves the child to drown. Oh...he "forgot" the child was still in the pool.
There is a tangible difference in the types of "forgetting" we are discussing here. I think a jury can see a difference easily.
RH spent considerable time with Baby Cooper in that restaurant. The child was active and talking. He put him in that seat with his own hands. He kissed that Baby. And , SECONDS! SECONDS! SECONDS later..He "forgets" he has a child with him? This is the key point that will put this Monster where he belongs...in jail or on death row.
That kind of "forgetting" defies all credulity. To believe it, is to believe that RH is barely functional, needs supervision and care HIMSELF. The other option is that he is a child killer who chose a tortuous death for his own Baby.