From the third place of articulation are heard five letters, namely דטלנת. This is the extremity of the tongue in combination with the flesh of the teeth. If you press gently, you hear from it דֿ and תֿ rafe. If you press with force, you hear from it דּ and תּ with dagesh. This differs from the second place of articulation, which is divided into two places (when the letters are pronounced) with dagesh and rafe respectively, namely the (back) third of the tongue and its middle. Dalet and tav are not like that, rather their place of articulation does not change, whether they have dagesh or rafe. Dagesh denotes pressing with force and rafe (pressing) lightly.