insist

1 - Many people dispute the claim that Columbus discovered America and insist that that was done by a Viking explorer.

2 - Migraine-patients who go untreated for too long may have structural changes in their brains, so they should insist on proper therapy.

3 - Police insist that Michael did not follow the correct procedure in applying for a visa.

4 - The U.S. and its European and Arab allies insist that a peaceful solution is impossible while Mr. Assad remains in power.

5 - Germany's insistence on the paramount importance of EU countries sticking to the rules has irked many during the debt crisis.