Other bible translations actually use the word “reasoned”:
http://www.biblegateway.com/passage/?search=1%20Corinthians%2013:11&version=NIV;KJV;KJ21;YLT
Yes, that’s true.
It can be hard to tell what’s going on in children’s brains. My 4-year-old is in first grade Sunday School this year, to keep him out of trouble, but the DRE told me I shouldn’t expect him to have make his First Communion next year with the second grade. She’s right - he reads, adds, and memorizes like crazy, but he’s not, as far as I can tell, engaging in moral reasoning beyond, “I was told not to X; now I’m in trouble!”