Foundations (Fundamente), 4, 9-10, 22, 24, 26, 48-51, 83, 89, 92, 95-96, 129, 139, 150, 153, 155, 157, 160, 164, 165 (in λόγος), 171, 197, 199, 209-210, 214-215, 219-220, 223, 228, 233, 252, 268-272, 299, 304, 319, 335, 373, 397-398, 417-148, 435; existential, 153, 157, 268; existential-ontological, 270 + fn (are a horizon.) See also ground; horizon (BT)