&gt; &gt; If two theses conflict each other at least one of them (perhaps even both) must be wrong.<p>&gt; This is too simplistic. They can be partially right as well as partially wrong. Is light a wave or a particle? Well, it depends.<p>In this case both statements (light is a wave and light is a particle) are simply wrong and as current scientific matters stand the description given by quantum physics seems to be the correct one (at least for about 70 years no experiment could be given that has disproved it).