Ahearn also mentioned the volumes of escaping gases. This is how they're predicting the eventual complete evaporation/sublimation of the comet to be ~100 years.
Any other 'hypothesis' would have to account for the formation of this volume of gas from some form of base elements (masses and composition) and electric discharge. It's a bit difficult to see this coming from discharges interacting with ordinary rock !
Also, given how close the probe came ~450 miles, I would've thought the electric discharge/sputtering would've been easily detectable from the onboard radio receivers. (Probably as broad spectrum radio interference). Same should have happened at the Temple 1 encounter.
No mention of any radio interference with comms etc, either.
??
Cheers
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