Why Eurodollar future can not be perfectly hedged?

this appears several times in notebook and mocks, who can tell me what does it mean and what’s the indication??

is it the reason why Eurodollar future doesnt have a formal formula for its price?

As fas as I know, Eurodollar future is a discount instrument (works similar to zero-coupon bonds) but Eurodollar time deposit in an add-on intruments (as typical deposit). This makes those two being affected differently by movements in interes rates.

For more you need someone more knowledgeable.

I think I just answered this in another post