Shakespeare Reference in Cat’s Cradle

My two favorite writers are William Shakespeare and Kurt Vonnegut, and in Cat’s Cradle, Vonnegut includes a Shakespeare reference. Vonnegut writes, “Every question I asked implied that the creators of the atomic bomb had been criminal accessories to murder most foul” (p. 39). The reference is to the first act of Hamlet, when the Ghost says “Murder most foul, as in the best it is,/But this most foul, strange, and unnatural.”