Hi, It may be something academical, non-practical issues, going to convergence of grammartic problem. In a situation where a clause started by "how" is used in a cleft-clause, which ones should we analyse the "how" clause as either exclamatory or interrogative? There is no interrogative in your example.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.