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Try these if you'd like an actual explanation of how Obj-C messaging works.

http://www.mikeash.com/pyblog/friday-qa-2012-11-16-lets-buil...

http://www.friday.com/bbum/2009/12/18/objc_msgsend-part-1-th...

I agree. This post isn't the best explanation and is riddled with grammatical errors that caused me to reread sentences multiple times. Regardless of the age of the author, if you put up a blog post that is supposed to explain a concept to other people, it needs to be well thought out and proof read.

Mike Ash is an excellent example of how to write blog posts about how things work

Also, Mark Dalrymple series http://blog.bignerdranch.com/author/markd/

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