class FalseClass

def blank?

false is always blank 
def blank?
  true
end

def sql_expr

false.sql_expr & :a # FALSE AND a

of Sequel's DSL:
Sequel::SQL::BooleanExpression, allowing easy use
Returns a copy of the object wrapped in a 
def sql_expr
  Sequel::SQL::BooleanExpression.new(:NOOP, self)
end