1.   But cost-conscious skeptics remain unconvinced.

2.   But skeptics remain among terrorism specialists.

3.   But skeptics remain, even among those who would like to believe.

4.   Despite the wave of new evidence, skeptics remain.

5.   Skeptics remain, however.

6.   Skeptics remain, be the coaches, parents, educators or critics at large who question his ways and the message they send.

7.   Skeptics remain, especially among geochemists.

8.   Skeptics remain.

9.   Still, skeptics remain.