Comment by canjobear

Hittite is also interesting because it provided one of the biggest validations of the methodology for reconstructing languages. Based on subtle patterns in vowels in other Indo-European languages, Saussure was able to figure out that there must have been three “laryngeal” consonants in Proto-Indo-European which were lost in all the attested languages. And lo and behold, when Hittite was deciphered, there were the laryngeal consonants right where the philologers had predicted them.