The Juno probe might prove cold fusion by show that more helium is contained in the gas clouds of Jupiter than was generated by the big bang nucleosynthesis (bbn).
http://www.einstein-online.info/spotlights/BBN
If cold fusion has been producing heat inside Jupiter for 4.5 billion years, then there will be an ash residue.
Of cource, science will find fault in bbn and not admit to LENR, but we will understand what is really going on with Jupiter.
Additionally, if the juno probe finds no solid core which would contain radioactive elements to generate 2 twice as much heat as Jupiter gets from the Sun, then another heat source must be causing all that heat. Let us see what new process that science will invent. One thing for sure, it will never be LENR.