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Is infinite scrolling bad for SEO? Is there a way to implement infinite scrolling without hurting a site's SEO?

Is it better to use a PDF or hard code restaurant menus (or any document for that matter) in HTML? I want the content to be indexed and thought PDF was the way to go for several reasons, but I wanted to get confirmation on this before I move forward.

Thanks that was very helpful!

Sorry for not being more specific. I meant, is it ok to use { in place of { and [ in place of [. I am more concerned with using hard coded special characters having a negative impact on rankings than title length. I've read that Bing tells webmasters not to use <>{} but I've seen elsewhere that these are ok on Google. Would hard coding these make their use acceptable on all SEs?

I've read blog posts stating that encoding special characters in title tags is both ok and not ok. Any definitive answer out there?

Do the extra characters from adding encoding count towards the total number of characters that Google displays in SERPs? Or do they just count as one character?