Because it's an incredibly vague statement that is open to many interpretations?

As written, actually, i don't agree with it.

Google has open sourced > 100 million lines of source code, depending on how you count.

I can't tell you what percent this is, but it is quite significant

It is the vast majority of a number of products, and not the vast majority of a number of other products.

In fact, for some subsidiaries, all of the code is open source. For some, it isn't.

So your statement depends on a lot - who are you counting, what is "their code" (Code we've written, code we've modified, or code we use), etc

If you make a detailed enough statement, i'd probably agree. But as written, there are plenty of cases where google open sources the vast majority of it's code.

If you insist on continuing to be disingenuous we can simply end the conversation.