i believe as the turkey does not feel any happiness it should be either 0 or undefined, resulting in the function being undefined beyond death either way.
True. If it realizes death is iminent, it spikes as this will, at some scale, still be a gradual process where happiness approaches zero before actually reaching it. If not, it stays wherever it would normally be in those instances. Starting at the moment of death, undefined.
Solid analysis especially considering what the artist thought they could slip past us: turkeys getting a little bit happier every day from birth to death.
where do you get that from? as far as i can tell, the only conclusion fro that part of the graph is that the turkey, on average, gains weight faster than happiness, though the exact relation of the two beyond that is unknown unless the weight curve is known. i would actually argue that it's losing happiness at the end as the weight curve should start to flatten out, yet the displayed curve doesn't follow that expectation.
"weight or happiness" i would understand as that is another established interpretation of a slash - "weight and happiness" though is, in my opinion, actually incorrect. in that case it would have been "weight + happiness"
"whoosh" is used for people who do not get the joke. we did get the joke but deliberately chose to ignore it to make a different joke. there is a difference between those two.