Lyric discussion by Beltane 

Cover art for Scarborough Fair lyrics by Sarah Brightman

I disagree. If you read the lyrics you see the tasks themselves are impossible. sickles need to be metal, and you cannot make a shirt without any stitches or seams. This songs meaning is more clear with the original lines from the old folk song, which adds in the last verse that if the poor lover will simply say that he/she will attmept these tasks, thats all the singer needs for complete assurance.