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Single Idea 19309
[filed under theme 2. Reason / A. Nature of Reason / 1. On Reason
]
Full Idea
Although logic does not seem specially relevant to reasoning, immediate implication and immediate inconsistency do seem important for reasoning.
Gist of Idea
Logic has little relevance to reasoning, except when logical conclusions are immediate
Source
Gilbert Harman (Change in View: Principles of Reasoning [1986], 2)
Book Ref
Harman,Gilbert: 'Change in View: Principles of Reasoning' [MIP 1986], p.20
A Reaction
Ordinary thinkers can't possibly track complex logical implications, so we have obviously developed strategies for coping. I assume formal logic is contructed from the basic ingredients of the immediate and obvious implications, such as modus ponens.
The
34 ideas
with the same theme
[general role of reason in mind and living]:
1502
|
Parmenides was much more cautious about accepting ideas than his predecessors
[Simplicius on Parmenides]
|
243
|
It is foolish to quarrel with the mind's own reasoning processes
[Plato]
|
224
|
When questions are doubtful we should concentrate not on objects but on ideas of the intellect
[Plato]
|
11283
|
There is pure deductive reasoning, and explanatory demonstration reasoning
[Aristotle, by Politis]
|
23250
|
Desired responsible actions result either from rational or from irrational desire
[Aristotle]
|
2676
|
Didactic argument starts from the principles of the subject, not from the opinions of the learner
[Aristotle]
|
1848
|
We are coerced into assent to a truth by reason's violence
[Aquinas]
|
22708
|
Good reasons must give way to better
[Shakespeare]
|
13009
|
A reason is a known truth which leads to assent to some further truth
[Leibniz]
|
16897
|
Reason is the faculty for grasping apriori necessary truths
[Leibniz, by Burge]
|
6253
|
Reason is our power of finding out true propositions
[Hutcheson]
|
5604
|
In reason things can only begin if they are voluntary
[Kant]
|
5622
|
The boundaries of reason can only be determined a priori
[Kant]
|
5623
|
If I know the earth is a sphere, and I am on it, I can work out its area from a small part
[Kant]
|
21416
|
Philosophers should not offer multiple proofs - suggesting the weakness of each of them
[Kant]
|
21974
|
The world seems rational to those who look at it rationally
[Hegel]
|
7083
|
Highest reason is aesthetic, and truth and good are subordinate to beauty
[Hegel]
|
17892
|
For clear questions posed by reason, reason can also find clear answers
[Gödel]
|
23945
|
Reason is actually passions, guided by perspicacious reflection
[Solomon]
|
3811
|
Entailment and validity are relations, but inference is a human activity
[Searle]
|
3822
|
Theory involves accepting conclusions, and so is a special case of practical reason
[Searle]
|
19304
|
The rules of reasoning are not the rules of logic
[Harman]
|
19306
|
It is a principle of reasoning not to clutter your mind with trivialities
[Harman]
|
19307
|
If there is a great cost to avoiding inconsistency, we learn to reason our way around it
[Harman]
|
19309
|
Logic has little relevance to reasoning, except when logical conclusions are immediate
[Harman]
|
6950
|
You can be rational with undetected or minor inconsistencies
[Harman]
|
3099
|
Inference is never a conscious process
[Harman]
|
23249
|
The early philosophers thought that reason has its own needs and desires
[Frede,M]
|
9429
|
Many forms of reasoning, such as extrapolation and analogy, are useful but deductively invalid
[Mumford]
|
4767
|
Traditionally, rational beliefs are those which are justified by reasons
[Psillos]
|
20955
|
Art can make reason more all-inclusive, by articulating what seemed inexpressible
[Bowie]
|
5750
|
Consistency is modal, saying propositions are consistent if they could be true together
[Melia]
|
6585
|
Rationality is threatened by fear of inconsistency, illusions of absolutes or relativism, and doubt
[Fogelin]
|
8952
|
We reach 'reflective equilibrium' when intuitions and theory completely align
[Fisher]
|