Strong crossover

Definition
Strong crossover is a one kind of crossover. It occurs in configurations in which a wh-element or quantificational NP undergoes A-bar movement across a pronominal which c-commands the extraction site, as in (i):

(i) *Whoidid heisee ti

Who is moved across he in (i). The fact that he cannot be coindexed with ti(which would yield the reading: which x, x saw x), is referred to as 'strong crossover', because on the intended reading the structure is strongly ungrammatical. Since the wh-trace, being a variable, must be A-free, binding by he would constitute a Condition C violation. To be distinguished from weak crossover.

Links

 * Utrecht Lexicon of Linguistics