Complex sentence: Quasi-realism is an expressivist meta-ethical theory propounded by Simon Blackburn which asserts that whilst our moral claims are projectivist we understand them in realist terms as part of our ethical experience of the world.
Split into simpler sentences: Quasi-realism is an expressivist meta-ethical theory propounded by Simon Blackburn. In essence it forwards that whilst our moral claims are projectivist we understand them in realist terms as part of our ethical experience of the world.