Warner Brothers, the studio responsible for this picture, has a history of anti-feline bias dating back at least to the old Sylvester and Tweety cartoons.
Missing lineages can lead to inaccurate phylogenetic reconstructions, and anomalous branch lengths can in turn bias dating analyses (e.g., [ 75]).
Our analyses also suggest that different viral lineages may have different TDRP dynamics, and this may bias date estimates if it is unaccounted for.
Arrival date may bias pairing date, because early arriving, high quality males should wait longer to pair than late arriving poor quality males, as early in the season there may be few females available.
Notably, both of these studies contained a large amount of mitochondrial DNA data (cytochrome oxidase I) which can bias divergence dating studies toward older dates [ 39- 41].
Since index date 2 might be subject to information- and recall bias, index date 3 is considered to be the most reliable index date for risk estimates.
In fact, the confidence intervals of our estimates for diversification rate of core Ruschioideae surpass those for any other plant group, including Dianthus L. (Caryophyllaceae), the most rapid plant radiation document to date (Valente et al., 2010b), although we acknowledge that limited sequence divergence may bias the dating calculations to a degree.
There has been no report on the discovery of the 21-μm feature in the MCs, although the 21-μm sources in our Galaxy are metal-poor, but this may be caused by the observation bias: to date, only evolved AGB stars (not PPNe) have been observed in the MCs.
Another possible explanation is that non-MCA rate behavior has lead to substantial bias in dating the TMRCA.
To exclude the possibility that individual calibration constraints may bias our dating analyses, we repeated them after removing each calibration point in turn following [ 16].
