this paper we describe several attempts at defining a simple version of Hoare's logic in the LF. This is used as a framework for discussing certain issues that are raised. We give, in detail, three different attempts at formulating Hoare's logic in the LF, only two of these are in any sense successful. Both successful versions suggest certain desiderata concerning the nature of tacticals in the LF and how they can be used in faithfully presenting logics. We also mention some alternative solutions in passing. The structure of this paper is as follows. In the next section we give a brief description of the particular version of Hoare's logic that we shall deal with. The next section will then deal with the simple minded attempt to represent it in the LF. The most interesting feature of this attempt is that it is not successful. The fourth section rectifies this, and the fifth section refines this solution. 2 The Subject Matter