Should know how to use a hand plane, scraper, backsaw , ripsaw, . ...
Should know how to sharpen a ripsaw.
Should know how to sharpen a set of chisels without a jig.
Should know how to seamlessly repair drywall.
Should know how to replace window panes and do a good glazing job .
Should know and understand the difference between oil and latex based paints and the value and suitable application of both.
Should know that none of this is important unless he's happy with himself and confident in his abilities.
Justin