What is and what is not problematic about the T-model
This paper focuses on two important discrepancies between the T-model of the grammar and performance systems responsible for production and comprehension. It argues that independently from the assumed perspective on the competence-performance distinction, one of them is not problematic and the other is. There is no real contradiction in directionality conflicts, i.e. in the fact that the grammar works strictly bottom-up, while performance systems involve many top-down processes. However, the fact that the computational system takes only lexical items and their features as its input presents a real problem, which manifests itself in the domains of scope and Information Structure. This problem can be solved in the grammar architecture where the C-I interface can be used during the derivation.