At no point did I say weaning at four months was better than 6 months, I merely quoted the studies which suggest that weaning between four and six months could be more beneficial than waiting to six months (Zutavern) This is very different to asserting that weaning at four is better than waiting to six. The evidence for this has been provided in all of the information I have provided...so it would be worth reading it.
Sheesh, some studies suggest weaning prior to three months is beneficial in certain medical circumstances...I am sure you are also aware of those. However that is not in question here.
Again the information regarding WHO guidelines being partly due to (not entirely, I never stated entirely) hygiene is also within one of the earlier links where it clearly mentions sanitation and hygiene practices. When we worked abroad we were briefed on this ourselves by our team leaders (verbally, but link provided to documentation as stated), as the main studies conducted were in developing countries where access to clean water to even wash bottles was non existent, and therefore owing to recommendations that all equipment be sterilised until an infant is six months old (with the exception of premature babies etc.) it was felt safest to recommend exclusive breastfeeding until six months as the risk of food contamination was much lower.
You seem to have got a bit carried away with your assertions, and again haven't provided any information base for your statements, which TBH sound like they have just been read from an NCT workbook or some website.
I'm not prepared to continue debating as you clearly haven't read the information which i provided, and I'm starting to feel a bit embarrassed that you can't provide links to your evidence but are quite happy to challenge scientific theories and investigations.
You can continue to argue about it, but I disagree and am happy to do so as I have many friends and colleagues who work in this field, as well as having studied formally in the area myself. Ok I may not have become medically qualified in pediatric diet after my studies as I chose a different path, but I have done research in the area as it is of great interest to me, and I have a number of peers who do work in the field.
You seem to have become confused with scientific theory and a theory made up by some bloke in a pub. I am merely discussing and quoting evidence which has been scientifically tested. I am not saying it is fact or true, merely stating what has been scientifically tested.
If you can provide evidence as to what you are saying is "true" then I'd be happy to read that evidence and make my own mind up on the balance of all the information available.