Quine was essentially trying to structure his debate around the idea that positivism (or empiricism, as we think of it today) is based on two false assumptions. Those assumptions he termed the "faulty dogmas", and they are as follows.
1) There is a distinction that exists between analytical concepts and synthetic concepts
2) Reductionism (not something I can easily distill into a paragraph) is true
Now, there are layers upon layers of meaning for each concept, and there are whole classes built around analyzing them. It's beyond the scope of an "easy" question to really exemplify this. Here's a good site that really goes through examples:
May 18th, 2015
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