Monday, January 23, 2012

I was recently asked this question....

"Do you know of any natural therapies I can take to help me sleep?"

You're smiling I know. 

I replied - "Um....remain caffeine free, don't eat late, get your OSAS treated"

Ok no I didn't...

I mumbled something about not knowing much about "natural therapies".

I should have said this:

"I don't know much about "natural" therapies. I prefer to take medicines that are carefully regulated, and that have effects and side-effects that are diligently quantified."

So there. But that would have been unnecessarily unpleasant, don't you think?

What I would like people to know is this:

Many people say they take "alternative medicines" because they are "natural", which on it's own is thought to be good (another topic for later), but also because this is perceived to make them safer (ie less or no side effects or toxic effects). In general however, there are very few effective drugs that have absolutely no side effects, "natural" or otherwise. A more realistic interpretation is that medicines that have no side effects have little or no actual effect, beyond placebo. 

Any "medicine" that you put into your body has to interact with your body (via receptors) to have an effect. If it can do this (produce a desired effect, pharmacologically) it can also cause side effects, and if you take enough of it, toxic effects. Herbs and spices are not magically different in this respect. 

There are also ideological reasons people like "natural therapies" such as a general suspicion of Big Pharma and Rich Doctors. Strangely the same people are not at all worried about the motives of Big Woo (large companies that fleece their customers into buying mostly worthless "alternative" rubbish). 

Anyway, you could always try sticking a lighted candle in your ear! Sounds sensible to me.
(you can probably pick one up from your local Pharmacy)

Saturday, August 6, 2011

A gem from Steve Novella

"Motivated reasoning is what most people do most of the time – start with a desired conclusion and then find reasons to support it (humans are very good at that). However, the whole point of philosophy is to rise above this tendency and follow strict rules of logic, while the point of science is similar but also to follow the evidence."


http://theness.com/neurologicablog/index.php/the-motivated-reasoning-of-egnorance/#more-3506

Thursday, March 17, 2011

Morals and Evolution

Peter Singer on what evolution might teach us about our moral judgements.

http://www.themonthly.com.au/peter-singer-does-understanding-evolution-help-us-understand-ethics-3036

Criticism of Sam Harris - his response:

http://www.samharris.org/site/full_text/response-to-critics/

Is there a naturalistic fallacy? Does Sam Harris fall into it?

Tuesday, November 16, 2010

Evidence for Non-Existence

There is an excellent blog here at http://rationesola.blogspot.com

In this blog entry http://rationesola.blogspot.com/2010/11/is-it-rational-to-believe-in.html the author makes a convoluted case for the improbability of Christian (and general) supernaturalism. I don't know if the author is male or female, so I'm taking a purely 50/50 (and possibly slightly politically correct) punt that she is a female. I will correct this if required should I obtain evidence of that necessity!

She makes the following point about the rationality of holding a belief in the Christian supernatural realm that is bread-and-butter agnosticism (and with which I fully agree):
Even if we granted, for the sake of argument, that the Christian supernatural realm might exist, the evidence, in this situation, is so bad that withholding belief in the existence of such a realm (or of any other) would be the only rational position available.
More importantly, like any good agnostic, she doesn't overstate the case:
It is important to note that this is not the same thing as saying that it is rational to believe that a supernatural realm does not exist. That position is not justified by the evidence: so far as that goes, it might well exist. 
And finally, but almost superfluously: 
But equally, just because we cannot confirm that a supernatural realm does not exist, doesn’t make it rational to believe that it does exist.
She is making the point that it is not rational to believe in something without evidence.

But then, in a footnote:
Another way of putting this is to speak in terms of probabilities. The absence of evidence for X doesn’t rule out the possibility that X could still exist. But it does make the existence of X highly improbable. So is it rationally acceptable to believe in something which, so far as the evidence goes, is highly improbable? 
Here is a glimpse of the the probabilities argument, elegantly graphed in Dawkins' The God Delusion, for positive atheism (for want of a better description) http://crtopherthinks.blogspot.com/2010/04/positive-and-negative.html

For if the absence of evidence for X makes X highly improbably and prompts the question "so is it rationally acceptable to believe in something which, so far as the evidence goes, is highly improbable?" then it equally suggests "is it rationally acceptable to NOT believe in something NOT existing, the existence of which, so far as the evidence goes, is highly improbable?"

In this quote the Solo Rationalist (yes yes I know....) appears to contradict her earlier point implying it would be less than rational to suggest the supernatural realm does not exist on the absence of evidence for its existence. In the probabilities argument, the absence of evidence makes it's existence highly improbable, and thus it's non-existence highly probable (since the probability coin can have only two sides). In this case it would seem quite rational to claim a belief in the non-existence of the supernatural, since to not believe in the non-existence of something that is highly improbable, is irrational!

I only make this point because many argue that agnosticism is the most rational position. And indeed on the face of it one must ask what constitutes evidence for the non-existence of something. Perhaps the probability concept will help me. I'm gonna think on it! BTW I don't mean to suggest that rationesola unknowingly contradicted herself. The footnote applied to an earlier part in the post than the part I initially quoted.


Sunday, August 29, 2010

Islam

Safe to say that Sam Harris is not a fan of Islam!

The question is "Is Islam the least tolerable of all the religions?" He writes...

At this point in human history, Islam simply is different from other faiths. The challenge we all face, Muslim and non-Muslim alike, is to find the most benign and practical ways of mitigating these differences and of changing this religion for the better.

Is Islam the type of religion that can be "changed for the better"? Is it open to reform? Is it reformable?

More on this later.

Elementary Rules of Logic

I don't want to get into the habit of just cutting and pasting other peoples ideas without qualification.....oh what the heck!

Hitchens Elementary rules of Logic (Slate Magazine)

1. Extraordinary claims require extraordinary evidence 

2. What can be asserted without evidence can also be dismissed without evidence.


Pretty much sums it up for me!