I should have found out about
this article before making this thread.
The Simple View (SV) is the view that "that there are no informative, non-trivial persistence conditions for people, that is, that personal persistence is an ultimate and unanalyzable fact".
SV has two versions, IM (identity mysticism) and WR-INI (weakly reductive and in independence non-informative).
IM is: "X at t1 is identical to Y at t2 if and only if X at t1 is identical to Y at t2".
WR-INI is: "X at t1 is identical to Y at t2 iff there is some fact F1 about X at t1, and some fact F2 about Y at t2, and F1 and F2 are irreducible to facts about the subjects’ psychology or physiology, and X at t1 is identical with Y at t2 in virtue of the fact that the propositions stating F1 and F2 differ only insofar as that “X” and “t1” occur in the former where “Y” and “t2” occur in the latter".
"In their most prominent variants [in WR-INI], these elements [F] are due to references to souls, Cartesian Egos or other spiritual or immaterial substances and/or properties."
We can promptly think of objections to that:
"Initially the idea underlying this claim may appear prejudicial; ultimately it is based on a number of widespread but not universally accepted beliefs about the naturalness of the world and the nature, validity and theoretical implications of physicalism."
"According to this general stance, either both psychological and physiological continuity relations are fully reducible to a domain in which physical explanations are couched, perhaps in terms of the basic elements of a final and unified theory of physics, or they belong themselves to such a domain". So basically, personal identity is either grounded in a non-physical element, or it is ultimately grounded on physical elements. That was my worry when making this thread that, if physicalism obtains, personal identity is arbitrary and continuation of consciousness illusory.
"Nowadays, the Simple View is disparaged as a theory only maintained by thinkers whose religious or spiritual commitments outweigh the reasons that speak against their views on personal identity."
Reductionism:
"Psychological Criteria of personal identity hold that psychological continuity relations, that is, overlapping chains of direct psychological connections, as those causal and cognitive connections between beliefs, desires, intentions, experiential memories, character traits and so forth, constitute personal identity"
"Two apparently physiological theories of personal identity are at bottom psychological, namely (i) the Brain Criterion, which holds that the spatiotemporal continuity of a single functioning brain constitutes personal identity; and (ii) the Physical Criterion, which holds that, necessarily, the spatiotemporal continuity of that which sustains the continuous psychological life of a human being over time, which is, contingently, a sufficient part of the brain that must remain in order to be the brain of a living person, constitutes personal identity"
"Consider a test case. Imagine there to be a tribe of beings who are in all respects like human beings, except for the fact that their brains and livers have swapped bodily functions: their brains regulate, synthesize, store, secrete, transform, and break down many different substances in the body, while their livers are responsible for their cognitive capacities, basic integrated postural and locomotor movement sequences, perception, instincts, emotions, thinking, and other integrative activities. Imagine the brain criterion to be true for human beings. Would we have sufficient reason to believe the brain criterion to be true for members of the tribe in question as well, if we were aware of all facts about their physiologies? No, precisely because the brain criterion is true for human beings, a liver criterion would have to be true for members of this tribe. There is nothing special about the 1.3 kilograms of grey mass that we carry around in our skulls, except for the fact that this mass is the seat of our cognitive capacities."
Yeah, no, the brain and the liver are defined exactly by their functions, as what causes the brain and the liver to have such and such functions is the physical make-up of their cells, the nephrons and the neurons. A brain that stores, secretes and breaks down substance in the body is no longer a brain because it is made of nephrons or something that ultimately works the same as nephrons, making it a liver.
"We can further distinguish between three versions of the psychological criterion: the Narrow version demands psychological continuity to be caused “normally,” the Wide version permits any reliable cause, and the Widest version allows any cause to be sufficient to secure psychological continuity (cf. Parfit 1984). The Narrow version, we may note, is logically equivalent to the Physical Criterion."
"A criterion of personal identity tells us what our persistence necessarily consists in, which means that it must be able to deliver a verdict in possible scenarios that is consistent with its verdicts in ordinary cases."
"First, some attempts to cash out personal identity relations in psychological terms appeal exclusively to direct psychological connections. These accounts face the problem that identity is a transitive relation (see 1.a.) while many psychological connections are not"
"Appeal to overlapping layers or chains of psychological connections avoids the problem by permitting indirect relations: according to this view, the old man is identical with the kid precisely because they are related to each other by those causal and cognitive relations that connect kid and teacher and teacher and old man."
"Opponents of the psychological criterion typically favour a physiological approach. There are at least two of them: (i) the Bodily Criterion holds that the spatiotemporal continuity of a functioning human body constitutes personal identity (cf. Williams 1956-7; 1970; Thompson 1997); and (ii) the Somatic Criterion holds that the spatiotemporal continuity of the metabolic and other life-sustaining organs of a functioning human animal constitutes personal identity (cf. Mackie 1999; Olson 1997a; 1997b; Snowdon 1991; 1995; 1996)."
Utter slop, but the article provides enough counter-arguments.
Quasi-psychology:
"Assume, for reductio, that personal identity consists in direct memory connections. In that case the kid is identical with the primary school teacher and the primary school teacher is identical with the old man; the old man, however, is not identical with the kid. Since this conclusion violates the transitivity of identity (which states that if an X is identical with a Y, and the Y is identical with a Z, then the X must be identical with the Z), personal identity relations cannot consist in direct memory connections."
Theseus' ship but goofy.
"Second, memory alone is not necessary for personal identity, as lack of memory through periods of sleep or coma do not obliterate one’s survival of these states. Appeal to causal and cognitive connections which relate not only memory but other psychological aspects is sufficient to eradicate the problem. Let us say that we are dealing with psychological connectedness if the relations in question are direct causal or cognitive relations, and that we are dealing with psychological continuity if overlapping layers of psychological connections are appealed to (cf. Parfit 1984)."
"consider the case of Teletransportation above: if at t2 Y on Mars remembers having had at t1 X’s experience on earth that the coffee is too hot, then, necessarily, X at t1 is identical with Y at t2. The dialectic of such thought experiments, however, requires that a description of the scenario is possible that does not presuppose the identity of the participants in question. We would wish to say that since X and Y share all psychological features, it is reasonable or intuitive to judge that X and Y are identical, and precisely not that since we describe the case as one in which there is a continuity between X’s and Y’s psychologies, X and Y are necessarily identical. If some psychological predicates presuppose personal identity in this way, an account of personal identity which constitutively appeals to such predicates is viciously circular."
A decent article, but very shallow overview.