LHO opens 2H showing 5 hearts and a 4+ card minor
Partner passes.
RHO thinks for ages, toys with the 2NT card (enquiry as to partner's minor), then eventually emerges with 4H. It's now authorised information that either he has a good hand, or his heart fit is not all it could be (or both).
Your team-mates are unlikely to have opened a weak 2 on a 5-card suit unless it is very pure (KQJxx say) so they might not have had this start to the auction.
Do you bid 4S or not?

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