## What are they?

* Methods included in Rails
* Rails monkey patches `Object` so this is available on any object
* Not available in Ruby
* Used to check for presence

```ruby
# #present?
nil.present?         # => false
''.present?          # => false
'something'.present? # => true

# #blank?
nil.blank?         # => true
''.blank?          # => true
'something'.blank? # => false
```