A paper by Chris Fox and Paul Wiegert examined the Kepler dataset for indications of exomoons solely from transit timing variations. Eight candidate signals were found that were consistent with an exomoon, however the signals could also be explained by the presence of another planet. Fox & Wiegert's conclusion was more and higher quality transit timing data would be required to establish whether these are truly moons or not. However, in August 2020 David Kipping examined six of the eight targets (based on a pre-peer review version) and evaluated the evidence as uncompelling. The same study finds that Kepler-1625b I remains an exomoon candidate.