Contemporary folklore and stereotypes that we are exposed to contribute to a lack of knowledge concerning native American fishing practices. Brumbach (1986:36) noted that "popular folklore emphasizes fertilizer value of the fish but seems vague about their consumption as food." Perhaps the stereotype of the "hunter/gatherer" among anthropologists similarly attenuated a focus on fishing, as the word "fishing" is not included in the phrase "hunting/gathering." Despite this fact, in some societies, the role of fishing may have been equal to or surpassed that of hunting and/or gathering. 
Don Ihde called the hypothesis being 'hyped' and referred to clear evidence about the use of optical tools by, ., Albrecht Dürer and Leonardo da Vinci and others. As well the 1929 Encyclopædia Britannica  contains an extensive article on the camera obscura and cites Leon Battista Alberti as the first documented user of the device as early as 1437.  Ihde states abundant evidence for widespread use of various technical devices at least in the Renaissance and . in Early Netherlandish painting .  Jan van Eyck 's 1434 painting Arnolfini Portrait shows a convex mirror in the centre of the painting. Van Eyck also left his signature above this mirror,  showing the importance of the tool. The painting includes a crown glass window in the upper left side, a rather expensive luxury at the time. Van Eyck was rather fascinated by glass and its qualities, which was as well of high symbolic importance for his contemporaries.  Early optical instruments were comparatively expensive in the Medieval age and the Renaissance.