Why does `False in pandas.Series([True,True])` return True?

Question

False in [True,True]

False in pd.Series([True,True])

the first line of code returns False the second line of code returns True!

I think I must

Answer 1

>>> help(pd.Series([True, True]).__contains__)
Help on method __contains__ in module pandas.core.generic:

__contains__(key) method of pandas.core.series.Series instance
    True if the key is in the info axis

>>> pd.Series([True, True])
0    True
1    True
dtype: bool

^
info axis