If this card’s [On Play] [When Digivolving] effect activates on an opponent's Digimon with 3000 DP or less, then its DP is reduced to 0 and it's deleted, does the "[On Deletion] Lose 1 memory" effect given to my opponent's Digimon at the same time cause my opponent to lose 1 memory?
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Official Ruling
Yes, your opponent loses 1 memory.