Fox News (April 2004) asked the following question of 900 registered voters:

Do you support or oppose the US having taken military action to disarm Iraq and remove Iraqi President Saddam Hussein? Is that strongly support/oppose or only somewhat support/oppose?

Support strongly
49%
Support somewhat
16%
Oppose somewhat
7%
Oppose strongly
24%
Not sure
4%

In this example had the question only offered the response options, support and oppose, the results would have yielded only that 65% were in support and 31% opposed. The strength of opinion at the two extremes would not have been ascertained along with the knowledge that the conviction at either end—the strongly held views—was more than triple the more mildly held views.