 The simpler arguments by analogy are of two kinds: ones based on similarity (sādharmya; sārūpya) and others based on dissimilarity (vaidharmya; vairūpya). Such simple arguments involve two things, call them p and d, and two properties, call them H and S. An argument by analogy based on similarity is one where, if p and d are similar with respect to property H and d has property S, then p has property S. This gives rise to this argument schema: