  Noncoding RNA (ncRNA) and long noncoding RNA (lncRNA) are scientifically
invalid terms because they define molecular entities according to properties
they do not possess and functions they do not perform. Here, I suggest retiring
these two terms. Instead, I suggest using an evolutionary classification of
genomic function, in which every RNA molecule is classified as either
"functional" or "junk' according to its selected effect function. Dealing with
RNA molecules whose functional status is unknown require us to phrase Popperian
nomenclatures that spell out the conditions for their own refutation. Thus, in
the absence of falsifying evidence, RNA molecules of unknown function must be
considered junk RNA (jRNA).
