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irb(main):001:0> nil
=> nil
irb(main):002:0> nil > 10
NoMethodError: undefined method `>' for nil:NilClass
from (irb):2
from :0
irb(main):003:0> 10 > nil
ArgumentError: comparison of Fixnum with nil failed
from (irb):3:in `>'
from (irb):3
from :0
irb(main):004:0> 10 < nil
ArgumentError: comparison of Fixnum with nil failed
from (irb):4:in `<'
from (irb):4
from :0
irb(main):005:0> 10 == nil
=> false
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