It depends on what he was trying to say. As it is it looks like a sequence, “A, then B, and C”. But I think his point would be better made and stronger by using “than” rather then “then” and eliminating the commas.
It depends on what he was trying to say. As it is it looks like a sequence, “A, then B, and C”. But I think his point would be better made and stronger by using “than” rather then “then” and eliminating the commas.