A very large part of science, and philosophy in general, is speculation: Coming up with a hypothesis; proposing or refining a theory. Observation and experimentation to refute or confirm that speculation is what makes up the rest of the scientific method.
I’m not sure that the assertions in the TED talk below are accurate but they are thought provoking, and fit with my concern about demonizing opponents in a debate.
By way of Searching for Liberty in a post entitled Every Self-Described Liberal and Conservative Should Watch This.
For those who don’t use Adobe Flash, here’s a link to an mp4 version.