Question

I have seen many questions discussing intuitionist logic (Brouwer, Weyl etc.) on the site.

However, this whole area of logic seems to be dead, and it also looks like philosophers / mathematicians / logicians don't even take it seriously (or am I mistaken?).

I find intuitionist logic interesting, it was very much in the spirit of Schopenhauer, Nietzsche and Heidegger. It's a curious fact that Wittgenstein was so amazed by a Brouwer lecture in 1929 that he decided to get back to philosophy after a 16 year long break. However, he described intuitionist logic as "nonsense, all of it".

What caused the decline / death of attempts to found logic on immediate human intuition?

Answer 1

The decline of attempts to found logic on immediate human intuition can be attributed to subjective nature of intuition, the focus on objective analysis and the rise of formal logic.

Step-by-step explanation:

The decline of attempts to found logic on immediate human intuition can be attributed to several factors. One of the main reasons is that intuition is subjective and varies from person to person, making it difficult to establish a firm foundation for logical reasoning.

Furthermore, the rise of formal logic and the scientific method in the late 19th and early 20th centuries shifted the focus towards objective analysis and empirical evidence, leading to a decline in the emphasis on intuition as a basis for logic. This shift was influenced by advancements in mathematics, the natural sciences, and the skepticism towards religious and metaphysical claims.