Logic issues

[-JKP-]

There is also the problem of cherry-picking examples to fit the theory.

• In the Tucker and Janick book, for example, they chose a photo of a plant that looks quite a bit like a plant drawing in the small-plants section of the VMS. But... it is an atypical photo of that plant (almost a mutant version). The plant is normally a different color and shape and I have never seen one as odd as the one in the picture they used, so it is probably not a common variation. There is always a risk in choosing atypical examples as "proof" of an idea.
  
• In the same book, there is a plant ID for a plant that cannot grow in Meso-America. It's very habitat-sensitive to heat and humidity and has a very narrow range in a small region of California. It is very unlikely that it ever grew in the area they pinpointed for the VMS origin.