you can not possibly know that. just like we can not know who Satoshi really is. just being good at writing in English doesn't mean English is not someone's second language!
Where he explained that certain set of first, second, and forth posts were permanently deleted because they probably contains Satoshi's real names and address.
i have never heard this one before! do you have a source for this?
it is kind of hard to believe someone voluntarily publishes his real name and "address" on a public forum for no reason. and if that someone is Satoshi (a pseudo name chosen to protect the real identity) it becomes even less believable.
I found the direct quote from theymos, and here's it below
1, 2, and 4 exist in the staff forum. 3 was permanently deleted at some point (it must have contained Satoshi's real name and address).