The vast majority of abbacus books, including all the known early ones, had almost nothing in common with Leonardo’s masterpiece. In particular, they typically lacked the organization, precision, and expository standard of Leonardo’s treatise, and were much less extensive.
Note: Well biblical scholars would use this as justification for a later authorship. Right?
almost certainly a simplified abridgement of not one of Leonardo’s books (Liber Abbaci) but both Liber Abbaci and De Practica Geometriae.
Note: But who could have the skill?
This material was obviously included to make the treatise more useful to merchant readers, but from where did he take it?
Note: I love the assumption: he took this work from somewhere... He didn't create it himself. the lines that follow imply that the author Judy wasn't smart enough-based on this document alone. imagine if your ability as a __ was measured by one document, or one email, out God forbid one facebook post.
The young men from Apple Computer, however, saw things very differently. Here is how Levy summarizes their attitude: “[Their] job was to create new products that would both change the world and bring in some cash. The ethic was more practical: if it didn’t hit the streets, it wasn’t worth doing. Ideas were useless if they didn’t get out there. For the Macintosh, the most important design consideration was getting it on people’s desks.”
Note: This tie in nicely with the quote that without execution, ideas aren't innovation, they are a hobby.