We prove the existence of p-ideals that are nonmeagre subsets of P(ω) under various set-theoretic assumptions.

We give a simplified proof of the main lemma in “Ramsey filters and the reaping number—Con” by Goldstern and Shelah.

An abridgement and Revision of the author's thesis, Heidelberg, 1973, presented under title: Die Frage nach dem Sinn religiöser Sprache in der analytischen Philosophie der Gegenwart.