The problem of course is that it’s impossible for the target country to tell what flavor (kinetic, conventional, tactical nuke, strategic nuke) the warhead is until it impacts. And thus standard strategic ICBM doctrine for anyone who has ICBMs and/or SLBMs is “assume it’s the biggest nuke”, which of course triggers second-strike doctrine (“you launched on me, so I’m going to fucking glass your whole country”).
The problem of course is that it’s impossible for the target country to tell what flavor (kinetic, conventional, tactical nuke, strategic nuke) the warhead is until it impacts. And thus standard strategic ICBM doctrine for anyone who has ICBMs and/or SLBMs is “assume it’s the biggest nuke”, which of course triggers second-strike doctrine (“you launched on me, so I’m going to fucking glass your whole country”).