When I was doing physics at school , I remember all those experiments with iron filings , current and compasses etc.
If it does make a difference I think it may be reasonable to think that which hemisphere you are in makes a difference .
It’s like standing on the equator and then seeing water change directions within 5 metres either side,
And to respond to a post, while taking a little break in the walk, better have the sun in the back.
Are you maybe writing books IB? If not, I would suggest that.
Maybe on RFI/ EMI cancellations by dacs , or The power of quadruple blind testing and mind tricks. 
Generally the discussions about bias expectations and blind testing necessity generate some stress and aggressiveness.
But not here. Probably because most people don’t really care which direction of their fuse they have to choose.
“All amplifiers sound the same”
“There is no audible difference between copper and silver”
“Hifi racks don’t make any difference to sound quality”
“Materials in components do not effect sound i.e. speaker drivers”
“Cables make absolutely no difference to sound”
“Cables are NOT directional”
“Fuses do NOT make any difference to the sound”
“Fuses are NOT directional”
….Things I’ve read/heard since I’ve been in this hobby.
I hope this gets my message across. I’m sure it won’t though. 
I’ll get a little serious now. Somebody very close to me has being diagnosed with a serious illness and at our last appointment the doctor sat in front of us point blank and said your diet does not effect your health… there is no evidence to suggest that an anti inflammatory diet will effect you in any way. The thing is, I have read many reports to the contrary but because they were not double blind tests they cannot be regarded as scientific fact. Please have a think about that.
Just to point, I don’t really care of fuse directionality, maybe because I am too lazy to try and begin another time some listening tests comparisons which tire me.
But I believe in the possibility of the change in sound quality by reversing the fuse direction.
Before all else, I’m sorry to hear about the illness of a person very close to you. Life and health are far more serious matters than hifi, let alone tweaks.
On the last point you made, if the doctor said that s/he thinks that diet cannot affect health then I believe he or she is going against well established medical understanding. But if it was that diet is not known to affect that particular illness, or a particular diet is not known to have any particular effects on health, then that may indeed be the current best medical thinking. The trouble is that over the decades, and vastly facilitated by the internet, there have been any number of diets claimed to cure - or cause - (or aggravate or mitigate) any number of diseases, the vast majority without real foundation even though some may have countless reported claims or ‘studies’. And I understand that from time to time some have picked and studied formally - with conclusions sometimes supporting the claims, sometimes refuting. I doubt any normal doctor could even begin to keep up with claims from outside the recognised medical/health establishment, let alone be in a position to assess them. Sometimes, of course, a particular diet might have positive effects on someone’s health simply because they believe if does - and for that person the power of suggestion may be as real as any medical treatment (but it doesn’t mean the duet itself had the effect, and may not help a different person).
Thank you for your kind words. Without completely derailing the thread I will just say that the diet is not meant to be a replacement for the medicine but a supplement so to speak.
I also think it’s absurd to say that a healthy diet cannot affect a persons health. If I’m being honest my whole belief in medical science has been rocked. It’s not what I thought it was and I pray that people aren’t ever exposed to the problems with it.
If I turn the fuse around in the plug top of my kettle, I find that the tea tastes better. 
And nobody can prove otherwise. 
This is well established not to be true - it’s a common bit of fakery shown to tourists:
https://personal.ems.psu.edu/~fraser/Bad/BadCoriolis.html
Mark
What a shame, I must go back and ask for a return of my money. It was a good show
Have you tried it?
Fable: DON’T ARGUE WITH DONKEYS
The donkey said to the tiger:
Serious question
Are fuses designed to be directional?, I don’t mean specific audiophile fuses.
Then, if they are can we assume there is some manufacturers process to insert the wire the correct way round? If there is, there must be some Q/A testing regime in place?
Just thinking aloud
This was the question in my original post.
Did you get an answer?
If they were, they and holders would have keyed or asymetric fittings so they can’t be inserted incorrectly, or at the very least they’d have clear marking indicating intended direction.
@Innocent_Bystander thats a good point
But fuses do have writing on them and most dealers will tell you to install the fuse with writing reading away from ‘live’ bar.
Not too mention it’s only us crazy obsessives that even pay attention to this. In most applications this goes unnoticed.
One of the forums sadest threads ever. Maybe listen to some music y’all.