Hi,
ENABLE is not the correct name. It usoften used to switch OFF/ON something. For example to make an output high-Z.
You have just two equal inputs and one output. Your logic is called XOR gate.
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Here we have missing informations:
With three inputs there are 8 possibke combinations, but you show only four.
Additionally a two state output can only be high or low, but not "invalid".
A latch is similar to a memory cell. It can "freeze" it's state...but this is never shown in your truth table.
Klaus