Scoring: MP
Bidding went
1♥-1NT
2♦-2♥
4♥
Spade lead to declarer's jack.
Declarer cashes the ace of spades, crosses with the ♦K, throws his losing club on the high spade, Ace of diamonds, diamond ruffed high, low heart to T, and soon comes the claim of just made, losing 3 red tricks.
Do you think declarer took a legitimate line or did he know the hand?

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