  We review some aspects of the double solution theory proposed by de Broglie
at the beginning of the quantum era (i.e., in the period 1924-28). We
specifically analyze and rederive the so called guidance theorem which is a key
element of the full theory. We compare the double solution approach to the most
known pilot-wave interpretation, also known as de Broglie-Bohm or Bohmian
mechanics. We explain why de Broglie rejected the pilot wave interpretation and
advocated the double solution. We also discuss some philosophical issues
related to difference of strategies between de Broglie on the one side and Bohm
on the other side.
