Zuckermann acknowledges the presence of "local peculiarities and idiosyncrasies" but suggests that "there are linguistic constraints applicable to all revival attempts. Mastering them would help revivalists and first nations' leaders to work more efficiently. For example, it is easier to resurrect basic vocabulary and verbal conjugations than sounds and word order. Revivalists should be realistic and abandon discouraging, counter-productive slogans such as "Give us authenticity or give us death!" Nancy Dorian has pointed out that conservative attitudes toward loanwords and grammatical changes often hamper efforts to revitalize endangered languages (as with Tiwi in Australia), and that a division can exist between educated revitalizers, interested in historicity, and remaining speakers interested in locally authentic idiom (as has sometimes occurred with Irish). Some have argued that structural compromise may, in fact, enhance the prospects of survival, as may have been the case with English in the post-Norman period.