Water and fire magnify this. Picking out of season is a responsibility of timing. Section 10 (“采不时造不精杂以卉莽饮之成疾茶为累也亦犹人参”) is the nearby evidence: Rain, time of day and leaf age all matter; missing the window is a human scheduling failure, not just weather. This treats the text as a testable judgment, not a slogan.
Half a cup is water.