User blog comment:Edwin Shade/My Hierarchy Of Mathematical Understanding/@comment-32213734-20180111204545/@comment-32213734-20180111233639

Existence of any real object, either elementary particle, chemical substance, celestial body, biological species - is always proved before its adoption (usually through observations). We do not prove mathematical axioms since they are obvious. Existence of your thoughts, however, is not obvious - they equally may exist or not exist. What is reason to adopt as correct first of these two options?..