According to TVtropes, a straw Vulcan is a character used to show that emotion is better than logic. I think a lot of people take “straw Vulcan rationality” it to mean something like, “Being rational does not mean being like Vulcans from Star Trek.”
In TV Tropes jargon, “Straw” means a caricature, a fake, superficial stereotype.
In TV Tropes jargon, “Straw” means a caricature, a fake, superficial stereotype.