Thanks Rolf for these,
This provokes a question: How much context matters for any logic?
To me it seems that deduction is essentially context-free. It is a process of determining the necessary consequences from given abstract premises. Induction appraises context in a super narrow-minded fashion: only the things that are attended to are taken into the process. It assumes almost that these items have a pure existence in the abstract logic, i.e. that it is ok to take them out of the context, or decontextualised.
Abduction, on the contrary, appears to be a very much of a contextual process. And, as such, it must be a very much of a constructive one too.
Kind regards,
Salu
PS: I should really check Ken¡¯s readings on abduction before continuing on this.. Above is just a hunch.
On 16 Feb 2015, at 17:03, Rolf Johansson <[log in to unmask]> wrote:
> Yes, Peirce mentions three different kinds of explanatory hypotheses:
> 1) refers to facts unobserved when the hypotheses are made, but which are
> possible to observe,
> 2) refers to facts which are incapable of being observed, for instance
> historical facts, and
> 3) refers to entities which as far as we know are both factually and
> theoretically unobservable.
> And in addition to that, there seems to be a forth possibility of
> hypotheses based on analogy with known (observed) cases. So, at least four
> forms of abduction.
>
> Peirce's contribution is that he introduces a logic of discovery.
> "Abduction is the process of forming an explanatory hypothesis. It is the
> only logical operation which introduces any new idea; for induction does
> nothing but determine a value, and deduction merely evolves the necessary
> consequences of a pure hypothesis" (5.171). Induction and deduction are
> operative in the context of justification.
>
> Best,
> Rolf
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