All these points are strong and their theory is certainly plausible, but if we take a look at the subject from a different perspective, things may not be so clear anymore.

plausible 来自拉丁语 plausibilis（值得鼓掌的），由词根 plaudere（鼓掌）和后缀 -ible（可...的）构成。原指"值得赞许的"，现在主要指"看似合理的、可信的"，常用来形容理论或解释虽然未经证实但听起来很有道理。