Need formula to count based on a single criteria match in another column, that removes duplicate results in the count

[freeb1893]

I have the table below. I would like to count the number of unique values in Column A where the value in Column B = "FALSE", while also with the final count, remove duplicates/don't count duplicates.

The result for this would be a count of 2. The counts of Bob and False would only be counted once.

ow\Col	A​	B​	C​	D​	E​	F​	G​	H​
1​	NAMES	1000​	1001​	1001-002​	1001-003​			1001​
2​	Bob	FALSE ​	FALSE​	TRUE​	FALSE​			3​
3​	Bob	FALSE​	FALSE​	TRUE​	FALSE​			Bob
4​	Dave	TRUE​	TRUE​	TRUE​	FALSE​			Dave
5​	Dave	FALSE	FALSE​	FALSE​				Alex
6​	Alex	TRUE​	FALSE​	FALSE​	FALSE​

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Appreciate any help with this!