Many people who study dead languages have neologismophobic motives for that. Whereas living languages have vocabularies that are alive and that change over time, the dictionaries of dead languages are pretty much as dead as those languages themselves. There are terrorists who have it on their agenda, to introduce neologisms to dead languages, but so far such neologisms have only been developed in labs and none has been able to escape from a lab yet. A counterterrorism strategy against the introduction of neologisms to dead languages is the argument, that a language is by definition alive if it allows for the addition of neologisms to its vocabulary.