any-none.rb

> u.memberships.any?
#   (2.9ms)  SELECT COUNT(*) FROM "MEMBERSHIPS" WHERE "MEMBERSHIPS"."USER_ID" = 10080
# => true 
> u.memberships.none?
#  Membership Load (2.4ms)  SELECT "MEMBERSHIPS".* FROM "MEMBERSHIPS" WHERE "MEMBERSHIPS"."USER_ID" = 10080 ORDER BY team_id
#  Team Load (6.0ms)  SELECT "TEAMS".* FROM "TEAMS" WHERE "TEAMS"."ID" IN (1)
# => false 

# The any? method is counting the number of memberships, then presumably asking in Ruby if the number is more than 1.

# The none? method is selecting all data about memberships, then instantiating the objects, then selecting their relation, Team.
# Then it presumably does a `none?` on the 

# `any?` is checking for presence the way that the database prefers. `none?` is creating full-fat rails objects, then asking about their presence.