1) marketing is not sales - This is absolutely incorrect. Marketing is any communication that touches a prospect or customer. Copywriting is salesmanship in print. Sales is absolutely a key ingredient of marketing!
2) Marketing is about perception - Partially true... Branding is about perception, marketing is about much more than just perception.
3)Marketing is Ubiquitous - This time you got it right!!! Marketing is influencing every possible touchpoint with consumers.