"Once you go nuclear at all, you go nuclear for good; and you know it. Here is the parting of the ways, for from this point two opposite conclusions can be drawn. One is that therefore there can never again be serious war of any duration between Western nations, including Russia—in particular, that there can never again be serious war on the Continent of Europe or the waters around it, which an enemy must master in order to threaten Britain. That is the Government's position. The other conclusion, therefore, is that resort is most unlikely to be had to nuclear weapons at all, but that war could nevertheless develop as if they did not exist, except of course that it would be so conducted as to minimise any possibility of misapprehension that the use of nuclear weapons was imminent or had begun. The crucial question is whether there is any stage of a European war at which any nation would choose self-annihiliation in preference to prolonging the struggle. The Secretary of State says, "Yes, the loser or likely loser would almost instantly choose self-annihiliation." I say, "No. The probability, though not the certainty, but surely at least the possibility, is that no such point would come, whatever the course of the conflict.""