The other form of Buddhist meditation is vipaśyanā (clear seeing, higher insight), which in Tibetan Buddhism is generally practiced after having attained proficiency in śamatha. This is generally seen as having two aspects, one of which is analytic meditation, which is based on contemplating and thinking rationally about ideas and concepts. As part of this process, entertaining doubts and engaging in internal debate over them is encouraged in some traditions. The other type of vipaśyanā is a non-analytical, "simple" yogic style called "trömeh" in Tibetan, which means "without complication".