QUESTION 1: What was the central theme of the academic debate mentioned in the text?

QUESTION 2: What did one of the schools of thought propose regarding the origin of affective expressions?

Led a field project involving extensive travel to test the cultural learning hypothesis
He conducted laboratory experiments with infants
Analyzed media records in large cities
Published a theoretical review without fieldwork

That laughter can be easily suppressed in the face of something hilarious
That irritation is always a socially constructed reaction
That expressions vary completely across cultures
That it is impossible to genuinely suppress a laugh or avoid irritation in the face of great annoyance