People are to continue to salivate By Prof Dr Sohail Ansari &Counterfactual Theory
·
"Experience
is a great teacher, but she sends in terrific bills”. Minna Antrim Good judgment comes from experience,
and experience comes from bad judgment Rita Mae Brown
In the Quran there is a verse in Surah Al-Luqman that says:
31:12 "...Any
who is grateful does so to the profit of his own soul..."
Gratitude
has recently become a focus in psychological research. There is a positive
psychological effect in feeling thankful that results in appreciating life as
it is. We must learn to be aware of and to appreciate the good things in this
world to prevent taking them for granted. Being aware of the fact that it is
Allah only who has helped us in our life will make us appreciate His blessings
more. There is a link between practicing gratitude and feeling happy. Allah
tells us in the Quran that we shall be rewarded for showing gratitude:
Paranoia is to be perpetuated
Idiosyncratic impressions are always in danger of being
contradicted by reality. People cannot continue to salivate if they do not hear
a bell for a long time. Fringe party feeds the delusions of persecution so that
association a single or many is reinforced despite that original shock not
recurred. Party is to keep paranoia alive as paranoia keeps party alive.
·
The dog [in Pavlov's
experiments] does not continue to salivate whenever it hears a bell unless
sometimes at least an edible offering accompanies the bell. But there are
innumerable instances in human life where a single association, never
reinforced, results in the establishment of a life-long dynamic system. An
experience associated only once with a bereavement, an accident, or a battle,
may become the center of a permanent phobia or complex, not in the least
dependent on a recurrence of the original shock.
Gordon Allport A
Psychological Interpretation (1938),
·
p. 199.
Counterfactual Theories
A leading approach to the study of causation has been to analyze causation
in terms of counterfactual conditionals.
A counterfactual conditional is a subjunctive
conditional sentence, whose antecedent is contrary-to-fact.
Here is an
example:
“If Mary had not smoked,
she would not have developed lung cancer.”
In the case
of indeterministic outcomes, it may be appropriate to use probabilistic consequents:
“If Mary had not smoked, her probability of
developing lung cancer would have been only .02.”
A number of
attempts have been developed to analyze causation in terms of such
probabilistic counterfactuals. Since these counterfactuals refer to particular
events at particular times, counterfactual
theories of causation are theories of singular causation.
David Lewis
is the best-known advocate of a counterfactual theory of causation. In Lewis
(1986b), he presented a probabilistic extension to his original counterfactual
theory of causation (Lewis 1973).
According to
Lewis's theory, the event E is said to causally
depend upon the distinct event C just in case both
occur and the probability that E would occur, at the time
of C′s occurrence, was much higher than it would have
been at the corresponding time if C had not
occurred. This counterfactual is to be understood in terms of possible worlds:
it is true if, and only if, in the nearest possible world(s) where C does
not occur, the probability of E is much lower than it was in
the actual world. On this account, the relevant notion of ‘probability-raising’
is not understood in terms of conditional probabilities, but in terms of
unconditional probabilities in different possible worlds. Causal dependence is
sufficient but not necessary for causation. Causation is defined to be
the ancestral of causal dependence; that is:
(Lewis) C causes E just in case there is a
sequence of events D1, D2, …, Dn, such thatD1 causally depends
upon C, D2 causally
depends upon D1,
…, E causally depends upon Dn.
This
definition guarantees that causation will be transitive: if C causes D,
and D causes E, then C causes E.
This modification is also useful in addressing certain types of preemption.
Nonetheless, it has been widely acknowledged that Lewis's theory has problems
with other types of preemption, and with probability-raising non-causes (see
Section 2.10 above).
There have
been a number of attempts to revise Lewis's counterfactual probabilistic theory
of causation so as to avoid these problems. In the final postscript of Lewis
(1986b), Lewis proposed a theory in terms of ‘quasi-dependence’ that could
naturally be extended to the probabilistic case. Lewis (2000) presents a new
counterfactual theory of deterministic causation, in which he concedes that
there are problems in probabilistic causation that his account is not yet able
to handle. Peter Menzies (1989) offers a revision of Lewis's original theory
that pays attention to the continuous processes linking causes and effects.
This account is designed to handle cases of probability-raising non-causes.
Menzies (1996) concedes that this account still has problems with certain types
of preemption, and abandons it in favor of the theory discussed in Section 4.2
below. Paul Noordhof (1999) develops an elaborite counterfactual probabilistic
theory of causation designed to deal with preemption, and additional problems
relating to causes that affect the time at which an event occurs. Ramachandran
(2000) presents some apparent counterexamples to this theory, to which Noordhof
(2000) responds. Schaffer (2001) offers an account according to which causes
raise the probability of specific processes, rather than
individual events. This account is also motivated by the problems of preemption
and probability-lowering causes.
Comments
Post a Comment