If you debate on the internet, the one thing that will make you look like a massive tool is if you insist that others "google it" to find the "information" to back your claims.
Here's an analogy: If you write a paper for school, most of the time, you are expected to provide sources and citations, and include a bibliography. If you don't, you will get a failing grade, and if you're writing a serious study, you will get laughed out of the University. You would look like an even bigger fool if you tell your colleagues off for being "too lazy" to "google" your sources.
While debating on the internet is far less formal, you will look like an absolute fool if you make a claim, someone demands sources, and you refuse to give them. If my bibliography consisted of one sentence that said, "Just google it," that would speak volumes of my laziness. Any moron can demand that others "google" it.www.youtube.com/watch?v=c11Nbv…
If you cite a book that is unavailable in a free PDF format, if it's print you have to pay for, the least you can do is summarize a specific argument from it, or give a short excerpt.
I've had at least one person pull this crap. No, if YOU'RE the one making the claim, the burden of proof rests with you, and you alone. Gather your sources, present them, summarize them, and let your opponent pick them apart. The burden of proof will never lie on your opponent. Your opponent isn't going to do the research for you.
You are completely on your own.