What does Edwin mean when he tells Cole "we should have stayed in the water longer"? Use evidence and examples from the text to support your answer.

Edwin says this because if they'd stayed in the water longer, Cole might have "more" intelligent questions.... he may even have been able to answer a few on his own.

Edwin smiled.“That’s the first intelligent question I’ve heard you ask all morning.” He shrugged.“Maybe Garvey and I want redemption for our own mistakes in life. We were never able to help those we hurt.”
“Well, it’s my life,”Cole said.“Not yours.”
“We should have stayed in the water longer,”said Edwin, heading down the hill toward camp.