Carriers in harbor, battleships at sea

The closing question places all available Pacific Fleet carriers in Pearl Harbor while removing the battleships from the anchorage. Its premise is that Richardson had obtained the withdrawal of ships he considered unsafe or difficult to sustain there. The question returns to the earlier explanation that Japan withheld a third wave because it did not know where the American carriers were. Their presence in harbor would remove that particular uncertainty. The resulting attack, losses and wider consequences are left for the audience to consider, without a developed answer.