Now since the sceptical doctrine consists in the art of demonstrating contradictions through these _tropes_, we only require to elucidate these modes. The Sceptics themselves, like Sextus, for example (Pyrrh. Hyp. I. c. 14, 15) distinguish in these forms the earlier and the later: ten of them belong to the elder Sceptics, that is to say to Pyrrho, and five were afterwards added by the later Sceptics, and Diogenes Laertius indeed tells us (IX. 88) that this was first done by Agrippa. From a specification of these it will be shown that the earlier are directed against the ordinary consciousness generally and belong to a thought of little culture, to a consciousness which has sensuous existence immediately before it. For they proceed against what we call common belief in the immediate truth of things, and refute it in a manner which is immediate likewise, not through the Notion but through the existence which is opposed to it. In their enumeration, too, there is this same absence of the Notion. But the five others appear to be better, have more interest, and are manifestly of later origin; they proceed against reflection, _i.e._ against a consciousness which relates itself to the developed understanding, and thus specially against thought-forms, scientific categories, the thought of the sensuous, and the determination of the same through Notions. Now though the most part of these may appear to us to be quite trivial, we must still be indulgent towards them, for they are historically, and consequently really, directed against the form “it is.” But without doubt it is a very abstract consciousness that makes this abstract form “it is” its object and combats it. However trivial then and commonplace these tropes may always appear to be, even more trivial and commonplace is the reality of the so-called external objects, that is, immediate knowledge, as when, for instance, I say “This is yellow.” Men ought not to talk about philosophy, if in this innocent way they assert the reality of such determinations. But this Scepticism was really far from holding things of immediate certainty to be true; thus it actually stands in contrast to modern Scepticism, in which it is believed that what is in our immediate consciousness, or indeed, all that is sensuous, is a truth (_supra_, pp. 331, 332). As distinguished from this, the older Scepticism, the modes of which we would now consider further, is directed against the reality of things. 1. THE EARLIER TROPES.