 Guyer objects that at various places in the Transcendental Deduction Kant illegitimately assumes knowledge of necessity, and perhaps this argument falls to such a concern (Guyer 1987: 146–7). While this concern has the potential of weakening Kant’s argument, perhaps Hume would not deny the necessity under consideration at this point in the argument. Hume does maintain that it is in some sense impossible, given an experience of constant conjunction, that the mind not be carried from an impression of the first conjunct to an idea of the next: