Peak oil is the point in time when the maximum rate of global petroleum extraction is reached, after which the rate of production enters terminal decline and the price will inevitably climb with only minor variations in accordance with the economic situation pertaining at any particular time. Its hardly a fallacy despite what the oil companies would like you to believe. Oil, gas and their associated products were organic and are most certainly finite - long as geological time appears to most of us. Fiddling at extracting from tar sands in Canada and desperately trying to exploit small fields in the relatively young Atlantic Ocean show the chronic state of the industry - they know they can't keep up with increasing demand - greed makes them desperate liars.