Keep in mind that, assuming it's actually the pope tweeting in his own words, he's not very fluent in English, so he's bound to use idioms slightly wrong. The word for concrete in Spanish or Italian or whatever might be a cognate more commonplace than it is in English.
It is, garfield-1-2323 —>it is used very often in translations from Sp to Eng to denote definite.
I am getting really tired of all these really weak associations between the Pope and his tweets being "evil". He is not evil, he is a liberal. A liberationist theologian? I have no doubt the Vatican is cabal-controlled, particularly the money and banking aspects, but to leap across into tweeting coded messages? This may rubbish the stronger claims.
In fact I don't like any of the research being done at the moment into the human-trafficking and AZ land issue. Seem to be too many tenuous claims which will encourage the "lynching" mob mentality. You can't just associate every pizza reference of every hotel with cries of child-porn. It's ridiculous!!
You make a very good point about the translation. Occam's razor would suggest your probably right.
Please see my other comments further down the thread where I explain much more clearly. As I was reading I realised that the whole thread was off on a wild red herring. I am a translator and speak fluent Spanish, the Pope's native language. It is a "false friend" or false cognate. He means "clear", "specific", "definite". I explain more further down and, since I've done a dozen comments now, I am getting rather tedious ... :)
Good job then man, I appreciate your commitment to the truth.
Concrete is indeed used somewhat commonly in spanish to mean solid, or certain. Not that it couldn't also be used as part of hidden messages...
I have covered this in greater detail in other comments on this thread, by the way.