In response to TripleOG's comment:
LOL, Good Call. Sounds about right Eng!
Dunning–Kruger effect is a cognitive bias manifesting in two principal ways:
Unskilled individuals suffer from illusory superiority, mistakenly rating their ability much higher than is accurate. This bias is attributed to a metacognitive inability of the unskilled to recognize their ineptitude.
Those persons to whom a skill or set of skills come easily may find themselves with weak self-confidence, as they may falsely assume that others have an equivalent understanding. See Impostor syndrome.
The funny thing about the effect is those affected by the effect can be separated by intelligence levels which those with higher intelligence tended to greatly underestimate both their IQ number and their abilities compared to the average person while those with lower intelligence tend to give astronomical IQ numbers that can't actually be calculated and over exaggerate their abilities and achievements. (btw you can't accurately score an IQ over 140, it's the limitation of the test hence anyone claims higher without saying it's a doctors estimate is in fact lying. Anyone who grades on that level can confirm this as the testers won't actually give you a number but refer you to a specialist if you're interested). Doesn't mean it's true for all causes, as their are plenty of egocentric intelligent people and those of lesser intelligence who underestimate their abilities, but a large % tend to fall into the categories above.