Get this from a library! El positivismo lógico. [A J Ayer; L Aldama; U Frisch; C N Molina; et al]. Alfred Jules Ayer El positivismo Lógico. 2 likes. Book. Buy Positivismo lógico, el by Alfred Julius Ayer, L. Aldama (ISBN: ) from Amazon’s Book Store. Everyday low prices and free delivery on eligible.

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I am using the word “perceive”. Let us call a proposition which records an actual or possible observation an experiential proposition.

Frases de Alfred Jules Ayer (19 citações) | Citações e frases famosas

John Stuart Mill It is as if I had written “Stealing money!! We infer the existence of events which we are not actually observing, with the help of general principle. If there is thought to be a difficulty here, it is perhaps because there is also a correct and familiar usage of the word “perceive”, in which to say of an object that it is perceived does carry the implication that it exists. The principles of logic and mathematics are true simply because we never allow them to be anything else.

We say that a sentence is factually significant to any given person, if, and only if, he knows how to verify the proposition which it purports to express — that is, if he knows what observations would lead him, under certain conditions, to accept the proposition as being true, or reject it as being false.


Frases de Alfred Jules Ayer

Maksim Litvinov 1 – A Life by Ben Rogers, p. And this is a perfectly correct and familiar usage of the word.

The surest way to positiviemo them is to establish beyond question what should be the purpose and method of a philosophical enquiry. To make our position clearer, we may formulate it in another way. As Hume conclusively showed, no one event intrinsically points to any other. By mere deduction from what is immediately given we cannot advance a single step beyond.

I am using it here in such a way that to say of an object that it is perceived does not entail saying that it exists in any sense at all. Henri Matisse 3 – I’m afraid I’m going to have to revise all my various books and opinions. And the reason for this is that we cannot abandon them without contradicting ourselves, without sinning against the rules which govern the use of language, and so making our utterances self-stultifying.

And this is by no means so difficult a task as the history of philosophy would lead one to suppose. There are only two ways of approaching this problem on the assumption that it is a genuine problem, and it is easy to see that neither of them can lead to its solution.

Willard Van Orman Quine 6. The traditional disputes of philosophers are, for the most part, as unwarranted as they are unfruitful.

But these principles must be obtained inductively.


A Lifep. Poeitivismo other words, the truths of logic and mathematics are analytic propositions or tautologies. The problem of induction is, roughly speaking, the problem of finding a way to prove that certain empirical generalizations which are derived from past experience will hold good also in the future.

For if auer are any questions which science leaves it to philosophy to answer, a straightforward process of elimination must lead to their discovery. The criterion which we use to test the genuineness of apparent statements of fact is the criterion of verifiability.

Autores parecidos Ludwig Wittgenstein Marshall McLuhan 9 – Then we may say that it is the mark of a genuine factual proposition, not that it should be equivalent to an experiential proposition, or any finite number of experiential propositions, but simply that some experiential propositions can be deduced from it in conjunction with certain other premises without being deducible from those other premises alone. The Foundations of Empirical Knowledge Jeremy George, in [http: And, consequently, any attempt to base a deductive system on propositions which describe what is immediately given is bound to be a failure.

Frases de Alfred Jules Ayer.