The placeholder hints at a name.something format so why is facebook.com incorrect?
Also, after guessing Medium correctly, it seemed as though the image was out of sync with the input as it flashed the incorrect banner, telling me that it was something else.
Indeed, it's one of many posts talking about some characteristic about well known sites where i can advertise some other sites because they share that characteristic (usually top 10 websites to do X).
When I answer a question correctly (Chrome 37, OS10.9) both the "try again" and "correct" options show with the "try again" message covering the "correct" message, so it appears as though I answered incorrectly.
Yea, this happened to me on all of them. I missed the first answer which was facebook (I know...), then all of the subsequent ones I answered correctly told me I was wrong and the answer was facebook. Though I still got the points. I'm thinking it has something to do with me allowing javascript after answering the first question, I'm not sure though.