a.rb

def some_method
  return false if aaaaaaaaaaaa && bbbbbbbbbbbb
  return false if cccccccccccc || dddddddddddd
  return false if eeeeeeeeeeee && ffffffffffff
  do_something
end

b.rb

def some_method
  if (aaaaaaaaaaaa && bbbbbbbbbbbb) ||
     (cccccccccccc || dddddddddddd) ||
     (eeeeeeeeeeee && ffffffffffff)
    false
  else
    do_something
  end
end

c.rb

def some_method
  return false if [aaaaaaaaaaaa && bbbbbbbbbbbb,
                   cccccccccccc || dddddddddddd,
                   eeeeeeeeeeee && ffffffffffff].any?
  do_something
end

c_.rb

def some_method
  if [aaaaaaaaaaaa && bbbbbbbbbbbb,
    cccccccccccc || dddddddddddd,
    eeeeeeeeeeee && ffffffffffff].any?
    false
    e
  do_something
end

d.rb

def some_method
  if some_condition?
    false
  else
    do_something
  end
end

def some_condition?
  (aaaaaaaaaaaa && bbbbbbbbbbbb) ||
  (cccccccccccc || dddddddddddd) ||
  (eeeeeeeeeeee && ffffffffffff)
end

e.rb

def some_method
  if some_condition?
    false
  else
    do_something
  end
end

def some_condition?
  error_code.present?
end

def error_code
  @error_code ||= if aaaaaaaaaaaa && bbbbbbbbbbbb
                  1
                elsif cccccccccccc || dddddddddddd
                  2
                elsif eeeeeeeeeeee && ffffffffffff
                  3
                end
end