This paper assesses, and contests, the long tradition of attacks on the use
of invented sentences in language teaching. It seeks to separate arguments
against them which rely on parody and ridicule, from more reasoned asserti
ons. Four main serious arguments are identified: invented sentences are 'me
aningless'; they are not discourse; they are not 'real'; and they are 'bad'
for learners. Each of these claims is discussed in turn, and countered. It
is argued that, while invented sentences have often been uninspiring in pr
actice, there are no valid reasons of principle against their use. On the c
ontrary, sentences invented by a teacher for a specific context may have ad
vantages which are less easily attained by the use of attested examples: as
a means of making a lesson more personal and spontaneous; as illustration
of a Linguistic item; as a means of promoting noticing, and as mnemonics. T
he conclusion of the argument is that both invented and attested examples h
ave a role to play in language teaching, and that the dogmatic outlawing of
the former is misguided.