Taking 'The only thing I know about Gilbert is that I find him listed as co-author of Muskrat Ramble .' as a given, does it logically imply 'The only knowledge I have about Gilbert is his co-authorship of Muskrat Ramble.'
The only thing I know about Gilbert is that I find him listed as co-author of Muskrat Ramble .###The only knowledge I have about Gilbert is his co-authorship of Muskrat Ramble.