  In the light of the recent announcement of the discovery of the potential
biosignature phosphine in the atmosphere of Venus I present an independent
reanalysis of the original JCMT data to assess the statistical reliability of
the detection. Two line detection methods are explored, low order polynomial
fits and higher order multiple polynomial fits. A non-parametric bootstrap
analysis reveals that neither line detection method is able to recover a
statistically significant detection. Similar to the results of other reanalyses
of ALMA Venus spectra, the polynomial fitting process results in false positive
detections in the JCMT spectrum. There is thus no significant evidence for
phosphine absorption in the JCMT Venus spectra.
