I ken a spune frae a stot's horn.
"I had the honour to visit his late gracious Majesty, at his palace of Holyrood, where, I can assure you, I was as civilly entreated as the first in the land, not excluding the Lord Provost of Glasgow, tho' he and his tounfolk tried to put themselves desperately far forrit; but the king saw thro' them brawly, and kent a spoon frae a stot's horn as well as the maist of his liege subjects."—Motherwell.
I ken by my cog how the cow's milk'd.
That is, I know by the appearance of a thing when it is properly done.
I ken by your half-tale what your hale tale means.
Having told me so much I can guess the rest. Applied to those who come to borrow money.
I ken him as weel as if I had gane through him wi' a lighted candle.
I ken how the warld wags: he's honour'd maist has moniest bags.
I ken your meaning by your mumping.
Ilka bean has its black.