In this context the ability to recall creates the option to mix the best of the two options - reducing the risk of attack on false warning, as you can wait till detonations on home soil are confirmed before you commit (ie allow bombers to pass their positive control points) and assuring sufficient force to saturate the enemy defense, to inflict unaccaptable losses.
Incidentally the preference for this second option is fairly universal in academic circles - the US scholars call for cutting the land based ICBM leg in the US use or atleast de-alerting it, precisely due to the false early warning problem, as well as LoW.
There are also other aspects there - for example LoW stance requires quick decisionmaking which means that irrational leadership may launch without a proper cause before anyone could stop it (particularly relevant to current discussions due to Trump).
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Grumpy as always.
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