"I find quotations from that FAQ entirely unpersuasive. Their argument regarding how much absinthe would be necessary to produce a psychoactive effect assumes very low levels in absinthe, and that's part of what we're debating here."

Then you have evidence absinthe has high thujone levels? Every test I've seen, and those that are actually cited in the WS article found low levels.

Which study shows 35ppm?
A few studies have reported questionable results on modern absinthe (questionable by using older tests and marketing claims). These numbers are all still low. Can you drink half a liter of absinthe and not have the alcohol seriously effect you?

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"The fact that a small number of presumably absinthe-naive subjects couldn't tell the difference in three trials between the subjective effects of alcohol inebriation and the subjective effects of alcohol/thujone inebriation doesn't mean that someone who drinks absinthe regularly can't readily identify those effects, or that they don't exist."

So the idea that drinking a glass will produce noticeably different effects from alcohol is out the window, right? That's the majority of claims.

You are confusing absinthe with thujone. They were thujone-naive subjects (such as most people) who couldn't tell the difference when taking the drug that is claimed to cause noticable effects. Perhaps it really doesn't cause said effects in such low doses.

I know plenty of constant absinthe drinkers, so far nothing in the way of built up effects.

That's go one further, what effects are you talking about and how is the existence of these effects supported?

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"My interest in the psychoactivity of thujone is academic. I'm interested in psychoactive materials in general,"

I think I didn't word the question right.
What makes you think it's thujone? Where did you get the idea that thujone causes effects in absinthe?
(The point being that every time I've traced back thujone claims they always start with questionable science or false claims.)

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"Many of the people arguing against the psychoactivity of thujone (such as the editor of thujone.info) are either selling absinthe or are closely tied to people who are selling it... so I take some of their findings with a grain of salt - particularly when they dismiss incompatible findings. "

But is their data faulty? How is Lachenmeier connected? How am I connected?
Thujone.info mainly posts articles by other people, please show how they are connected. What findings have they dismissed?

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"What I don't understand is why you're insisting that thujone in absinthe is not psychoactive."

Because that's what every piece of credible evidence says.

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"The tiny number of available studies have established that under some circumstances thujone does produce measurable effects."

Under certain circumstances nutmeg causes intense hallucinations.
Based on that logic, people should be doing hot chocolate to hallucinate.