different, and the process of linguistic replication is imperfect, so
Language learning: Language is transformed as it is transmitted
from one generation to the next. Each individual must re-create a grammar
and lexicon based on input received from parents, older siblings and other
members of the speech community. The experience of each individual is
different, and the process of linguistic replication is imperfect, so
that the result is variable across individuals. However, a bias in the
learning process -- for instance, towards regularization -- will cause
systematic drift, generation by generation. In addition, random differences
may spread and become 'fixed', especially in small populations.