A error ID question from the blue book

Topeka
Mon, 02 Jul 2007 19:01:54 +0000

Blue book pg. 725 num. 22

Some of the workers who resent the supervisor’s authority would probably feel uncomfortable if they were to acquire the independence that they demand. No Error

Answer: No Error

Why is “would probably” correct? Why isn’t it “will” instead of “would”?