What is the total number of Psychological Dependence, when Pleasure is "2.3", and when Mean is less than 1.9300000000000002?
CREATE TABLE "addictive_potential" (
  "drug" text,
  "mean" real,
  "pleasure" real,
  "psychological_dependence" real,
  "physical_dependence" real
);
SELECT COUNT("psychological_dependence") FROM "addictive_potential" WHERE "pleasure"=2.3 AND "mean"<1.9300000000000002;