Indeed, the hardest part is for people to admit their own mistakes; but those that does, will move on and go further. Usually, the biggest obstacle is the part to admit and learn. I guess it also depends on how a person is brought up, as usual, most peopl will tend to tease, laugh and make joke at someone who did wrong, this will shape the person into someone who's not willing to admit mistakes, so if we have kids, its important for us to make them understand its ok to make mistakes and learn from it.

Knowdlege, skills, experience is never ending and its nothing to do with age or if the person is newbie or profesional. Personally, I wouldn't look down on someone who is new or fresh, who knows, he/she might know something that I don't even know, or have more creative ideas. This applies to any field.

Disclaimer: The statement above is not meant for anyone, but just find its good to mention this since jchue73 mention this.

My cheap 2 shutter clicks.