For many people it is an 'article of faith' [=something that is believed without being questioned or doubted] that the economy will begin to improve soon.
In “I gave a book to the boy” the word “a” is an 'indefinite article' and the word “the” is a definite article.
A lot of people pretend to be cowboys, but he's 'the genuine article'. [=he's a real cowboy]
(..) degeneration, are ahead of their time. - You're very kind. - No, really, it's fascinating. You've become kind of a hobby of mine. I found your article on the mutant retina gene to be particularly intriguing. But I haven't even... Published it yet? Don't worry, you will. (..)1998 TvShow: Charmed Title: The Truth Is Out There... and It Hurts Season: 1 Episode 8