On one side we have Slate with an infographic with the caption :
On the other we have a really delicious fisking of the graphic from Wendy McElroy:
Her starting comment before she shreds the graphic:
“All I can say is, I pity the fool that tries to use that flowchart on me. Below the break, if this subject doesn't bore you to tears by now, is my fisking of their arguments.
The arguments seem to progress from right to left, so I'll address them in that order.”