Cfluviurrh is, as far as I am aware, the first programming language designed for writing programs that can feel. Cfluviurrh defines a mechanism by which a program can be instructed to experience particular emotions.
You might, thus, on first blush, consider Cfluviurrh to be unimplementable, as modern-day computers are not capable of experiencing emotions (you guess.) However, this is demonstrably untrue. The reference interpreter demonstrates it.
(print ASCII table while experiencing a bewildering array of emotions) a=8 a*=8 b=a b+=a b-=2 :X a+=1 a> z@=X z?a<b
cfluviurrh in the Cfluviurrh distribution