gistfile1.txt

>> foo? = 1
SyntaxError: compile error
(irb):1: syntax error, unexpected '=', expecting $end
foo? = 1
      ^
	from (irb):1
>> def foo?
>>   1
>>   end
=> nil
>> foo?
=> 1
>> def bar(foo? = 1)
>>   nil
>>   end
SyntaxError: compile error
(irb):6: syntax error, unexpected tFID, expecting ')'
def bar(foo? = 1)
            ^
	from (irb):6