A novel that carries the philosophical and moral investigation of genius further than any other.

Augustine stated that he would never allow his philosophical investigations to go beyond the authority of God.

His second book Philosophical Investigations was published shortly after he died.

Philosophical Investigations is unique in its approach to philosophy.

Like all books of philosophical investigation, this one means to question more than to answer, to prick our minds and imaginations.

His annotations were considered valuable for their philosophical investigation and discriminating analysis.

Philosophical Investigations was published in two parts in 1953.

Kripke takes the paradox discussed in 201 to be the central problem of the Philosophical Investigations.

Wittgenstein mentions him in the introduction to his Philosophical Investigations as an influence.

Early philosophical investigations sought to understand good and evil and the concept of "the good".