LONGVIEW,
in terms of probability, I don't suppose that "p+e=n" correlates with the levels of excess heat encountered.
I understand that Lenr people could be sepctic by the revolutionary results from Indian's guy.
Therefore, i suggest that is less easy to make a mistake by several tons (by long time) than talking about COP 5 with 50W as XH.
So, if Lenr needs both exothermic/endothermic reaction it helps us to define new ways for explanation.
As well as, if exothermic reactions makes 1 Mev , the same for both endothermic reaction the total XH balance should be close to zero but really, some XH should appaer nevertheless helped by quantum fluctuations.
As AXIL said, we preferentially detect transmutations than XH. Concretely what would that mean ?
Imagine 2 H atoms and 2 another atoms just in a few space (NAE?), the first combination is endothermic with one H and one atom, the second combination is exothermic, so the balance is close to zero, that we see ,a few XH, therefore a bigger transmutation rate.
Now, we should consider 2 H atom associated not with 2 another atoms rather with 2 differents isotopes of the same atom.
Sorry, for my poor explanation because, it 's difficult to explain easily.
What does that mean, in the case of P&F, for example ?
They used Pd which have 6 stable isotopes, that means also several different isotopes should be "mixed" in the same sample.
By this way, it 's possible to meet both different exothermic/endothermic combination between Pd isotopes/Deuterium.
In Rossi's case, a lot people talked about Ni 62 role.
Maybe be he mixed a few Ni62 ( or 63) with common Ni isotope to meet the same behavior as i described before ?
Then reaction triggered, transmutations appaers to maintain this process.
In Piantelli's case, at the beginning, are we sure that his Ni rod was plenty of isotope 58 ? It would be just a few exposures close to radioactive points to move its isotopic distribution.
this explanation could be in relation with NAE concept from E Storms, a small space with H isotopes + 2 different isotopes from the same metal,or not ( exo+endo Lenr reaction) + energy from outside ( What you want, it doesn't matter, therefore heat remains more convenient) to destabilize both reactions to fall into a new lower equilibrium with few relative XH and full transmutations.