I dont even know what the what the point to this whole discussion is anymore.
Ive seen that led zep article before.
Oasis have copied the heck outa other bands. Its a fact. Theres no band I know of that have done it as much as oasis have. But that doesnt affect my opinion of their music. So what if 'Dont look back in anger' is the same chord progression as 'Let it be'. Both are great songs. And I prefer the modern Oasis one simply because it sounds modern.
Its like people who dont believe in the national lottery... cos its gambling... what about the fact that it gives a large amount to charity? Just because the process is flawed doesnt mean the product is. Oasis produce great music... so what if they used a little help along the way!
Would you kill a chicken to save 2 from dying?