Complex sentence: The Twin Earth thought experiment, introduced by Hilary Putnam (1975b), is responsible for one of the main arguments used against functionalism, although it was originally intended as an argument against semantic internalism.
Split into simpler sentences: The Twin Earth thought experiment, introduced by Hilary Putnam (1975b), is responsible for one of the main arguments used against functionalism. Although, it was originally intended as an argument against semantic internalism.