#StopAVN: The Doreyan Fallacy

It's a crazy place

How Meryl Dorey argues

This is how I imagine Meryl Dorey might respond to the recently published study comparing vaccinated and unvaccinated children. Surprise surprise, the only difference was in the vastly differing rates of vaccine-preventable diseases in the two groups.

And yet I have lost count of the number of times Meryl Dorey has leapt on individual instances of vaccine-preventable diseases occurring in the vaccinated, and made statements like this:

Have you considered the NUMEROUS studies showing that the recently vaccinated and therefore, supposedly immune – are getting these diseases? Have you considered the fact that vaccines can’t prevent the vaccinated from carrying and transmitting the diseases?

“Did I say that? I don’t believe I did. Let me see.”

So because some vaccinated people still get the disease they were vaccinated for, vaccines cannot provide immunity. Or to put it another way:

(< 100%) = 0%

As the graph in my comic shows, vaccines can be obviously be highly effective even if they are not 100% effective.

There is no need to labour the point further.  A child of five could understand it. Dorey can’t, or won’t. She makes the same mistake time and time again. So often, in fact, that I propose we name this specific example of the Perfect Solution Fallacy:

The Doreyan Fallacy.

What do you think?


  1. Paul Gallagher
    Posted March 12, 2011 at 13:45 | Permalink

    Oooh, ohhh. Analogy…

    MD opined;
    “That this organisation (bastard slime from SAVN) has used these tactics (abiding by the law) is shameful and should be taken seriously by the authorities (strange… I thought it was).
    That the media and government bodies such as the HCCC have cooperated with them (septic bastards) – even sending people who request more information about the current ‘investigations’ to their website (hey, quality is quality) – is criminal.

    It is time the Australian people learned the truth about the coordinated attacks on the Australian Vaccination Network by those who want, above all, to stop anyone questioning the safety or effectiveness of vaccines….”.


    REDUCTIO AD PERSECUTORUM may be briefly described as a logical fallacy perfected by Anti-vaccination campaigner, Meryl Dorey of the AVN. Another form of Association Fallacy, the aim is to derail arguments, deny responsibility or reject reality by creating the illusion of persecution and shift guilt to the imagined “persecutors” – agents hitherto seeking evidential clarification.

    The magnitude of persecution [MOP] is proportional to the weight of any dissenting agent’s request only for logic [ROFL]. Guilt by Association is best appreciated by those with well established cognitive detriments peculiar to correlation and causation, either post hoc or cum hoc.

    Eg; ‘they laughed at Galileo’, or ‘they tried to silence Jesus also’, seek to falsely ally the pursuit of rationality with as-yet-unrevealed ignorance/evil. This has a consonant binary purpose of aligning charlatans and criminals with the notion of Nobility as they battle “fascism”, “dictatorships”, sycophantic media” and “conspiracies”.

    Reductio ad persecutorum is easily applied to individuals, groups or society as a whole. Whether a government watchdog, shoestring volunteer agency, whistleblower, witch-huntee or XXX expert, please consider the benefit of being persecuted instead of correct.

  2. reasonablehank
    Posted March 12, 2011 at 13:48 | Permalink

    Excellent work, sir.

    I had thought that the Doreyan Fallacy was: that one who spends a decade on Google shall, with the assistance of their massive brain, accumulate all the expertise of a trained immunologist.

    I stand corrected.

  3. Posted March 15, 2011 at 19:33 | Permalink

    Love your writing style.At least you get vaccines in Oz.In the UK they wait until there is a potential epedemic and most people have already got the virus(specifically flu,in the UK) and several die then decide to run TV and radio ads telling “vunerable groups” to get vaccinated.Actually I’ll have to check youtube to see if any of those insane “vunerable groups” ads are on it.

  4. trixie melodian
    Posted October 29, 2011 at 11:35 | Permalink

    This study doesn’t even include the severity of the infection which is almost always significantly milder in the immunised who *do* develop the disease. If that factor was taken into account, the results would tilt even further in favour of vaccinating. Not sure how MD would respond to that…

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3 Trackbacks

  1. By What is herd immunity? – Dave The Happy Singer on October 22, 2011 at 14:11

    [...] Vaccines are not 100% effective. Some people will be at risk even if they have been immunised. Furthermore, there are people around us who can’t be vaccinated. Babies who haven’t had all their immunisations yet. People whose immune system has been weakened by another illness. But because vaccines slow or stop the spread of a disease, then the chance of the disease even getting to the vulnerable few is low. In other words: [...]

  2. [...] also hopeless with maths, so much so that she’s had a logical fallacy named after her: the Doreyan fallacy assumes that any percentage lower than 100% is equal to 0%. So a vaccine that is measured at 85% [...]

  3. [...] ‘It’s an incredible strategy. The harder Meryl Dorey fails, the more successful she is’, said Ms Dorey’s accountant, Leo Bloom. ‘It’s a bit like vaccination in that respect, according to Meryl.’ [...]

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