Times[2, Unevaluated[RandomReal[]]]gives 2 Unevaluated[RandomReal[] – andre Aug 18 '16 at 19:53
@andre Plus[0, Unevaluated[RandomReal[]]] numerizes too; one notices 1 and 0 are default values for arguments of Times and Plus. – BoLe Aug 18 '16 at 19:59
1
@BoLe There is no rule for Plus[1, Unevaluated[RandomReal[]]] (i.e. for Plus[1, RandomReal[]] with RandomReal[] not evaluated to a number). But there are rules for what you are proposing, so Unevaluated gets stripped. For Plus[1, 2, Unevaluated[RandomReal[]]] it's probably something like Plus[a_, b_, rest_] := Plus[InternalPlus[a,b], rest…
Done
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