[FOM] Book on the history of logic

[Sam Sanders]

>A good compliment to Kneale and Kneale (which despite its extremely
>narrow view of what counts as "logic" is still an invaluable resource)

Can someone explain to me why Kneale & Kneale's account of logic is 
"extremely narrow"?
If their account is indeed of such nature, what else should have been included?

Best, Sam Sanders
--
Yesterday, I saw infinity, but it was just outside of my reach.
Today, I brought an ultrafilter and caught it easily.