The physicist rightly dreads precise argument，since an argument that is convincing only if it is precise loses all its force if the assumptions on which it is based are slightly changed，whereas an argument that is convincing though imprecise may well be stable under small perturbations of its underlying assumptions.
物理學(xué)家恐懼于那些精確無(wú)誤的論據(jù)不無(wú)道理，因?yàn)槟撤N只有在它是精確無(wú)誤的條件下才令人置信的論據(jù)，一旦它賴于建立其上的假設(shè)稍有變化，便會(huì)失去它一部的作用;而與此相反，一個(gè)盡管并不精確無(wú)誤但卻令人置信的論據(jù)，在其基本假設(shè)(underlying assumption)稍微受干擾的情況下，仍然有可能是站得住腳的。