"We see through a glass, darkly," St. Paul said, warning against the temptation to chase the will-o'-the-wisp of certainty. But American evangelicalism is largely based on the idea that certainty is not only possible, but necessary. Mandatory, even. This certainty can be achieved thanks to the one-legged stool of the Evangelical Unilateral.
That's a made-up term, but it describes something real. It's a play on the "Wesleyan Quadrilateral" -- an approach to theological thinking that relies on the four foundations of scripture, tradition/community, reason and experience.
The evangelical approach to theological thinking is exactly like this Wesleyan method, except it doesn't include tradition or community. Or reason. Or experience. All of those things are viewed, instead, as potentially corrosive threats to the pure certainty offered by scripture alone -- by the unambiguous and self-evident, prima facie "literal" meaning of scripture. Such an approach requires not only that the text itself be pure, accessible, infallible, inerrant and impervious to misinterpretation but also that the reader of the text be pure, insightful, infallible, inerrant and incapable of misinterpretation. It requires that the reader be some kind of Platonic ideal, a blank slate uninfluenced by culture, language, intellect or life experience. That is, of course, impossible. The point here, however, is not to evaluate or criticize this evangelical epistemology, or to point out all the ways in which it does not and cannot work, but rather to acknowledge descriptively that this is how American evangelical Christians attempt to view the world.
When faced with apparent contradictions amongst scripture, tradition, reason and experience, a Christian applying something like the Wesleyan Quadrilateral will attempt to reconcile them. A Christian applying the Evangelical Unilateral will, instead, determine that they don't need to be reconciled and that any apparent contradictions between scripture and reason, or between scripture and tradition (i.e., how others have interpreted that same text), or even between scripture and their own life experience must be settled by embracing the apparent meaning of the former and rejecting the apparent meaning of the latter...
For some other Christian, someone relying on something like the Wesleyan Quadrilateral, this can be an instructive experience. Those kinds of Christians are allowed, and even required, to learn from their experience, from their reason and conscience...
But for an evangelical relying on the Unilateral, weighing your own experience against the purportedly crystal clear teachings of scripture is verboten. Something's gotta give and that something, in this case, is their own experience, conscience and instincts. That's when the panic-inducing cognitive dissonance kicks in and fight-or-flight takes over. And then anything could happen.