If you use absolute uniformitarianism as only as a methodological constrain to find our origins, without actually holding it as a world view, aren't you practicing doublethink?
Your scientific information is a few decades out of date. Absolute uniformatarianism hasn't been the dominant view in geology for some time. And as well it shouldn't - we've observed that the processes that operate today are entirely capable, under the right circumstances, of causing catastrophic events.
The dominant principle of geology today is a kind of uniformatarianism that recognizes the role of catastrophe in shaping the geologic landscape. It's merely the application of the general idea that the present is the key to the past. We have observations stretching back 2 billion years that support the merit of this methodology.
(In regards to "doublethink", the ideas have to actually be mutually contradictory for it to be doublethink. There's nothing mutually contradictory about the two ideas "we're going to accept this proposition on a provisional basis as part of a methodology" and "this proposition may not be true.")