1.   As if technical problems were not enough, there are also a number of conceptual problems surrounding the application of these methods.

2.   They locate the various strands in feminist thinking, and show the conceptual problems involved in combining them.

3.   The aim is to maximise the number of solved problems while minimizing the number of conceptual problems and anomalies.

4.   But they said the notion of announcing and prosecuting a war against someone like bin Laden posed significant conceptual problems, both for policy-makers and the American people.

5.   However, both extremes had their conceptual problems, and the compromise notion of brain wiring by chemotropism persisted.

6.   Posner said he recognizes the conceptual problems with the tables.