Seven World Riddles
Emil du Bois-Reymond used ignoramus et ignorabimus in discussing what he called seven "world riddles", in a famous 1880 speech before the Berlin Academy of Sciences.
He outlined seven "world riddles", of which three, he declared, neither science nor philosophy could ever explain, because they are "transcendent". Of the riddles, he considered the following transcendental and declared of them ignoramus et ignorabimus: "1. the ultimate nature of matter and force, 2. the origin of motion,... 5. the origin of simple sensations, a quite transcendent question." However, depending on the interpretation of "ultimate nature" and "origin," it is possible to consider some of these as partially or completely solved. For example, the sensory systems for the traditional senses (sight, hearing, taste, smell, touch) are now mostly understood, including some of the associated neural processing.
Read more about this topic: Ignoramus Et Ignorabimus
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