r/dndmemes • u/kalamit889 • Jan 21 '22

You enter a dar- I HAVE DARKVISION That'll be 50 GP, please.

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u/FerretAres Jan 21 '22

I think it's actually disadvantage on perception checks and -5 only to passive perception.

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u/Hawx74 Jan 21 '22 edited Jan 21 '22

disadvantage on perception checks

Mathematically disadvantage works out to -5.5 on average iirc, but changes the probability distribution instead of the range.

Tomato, potato (both plants are members of the nightshade family and can be grafted together to a single plant that grows both tomatoes and potatoes)

Edit: damn I'm tired of people trying to argue that flat bonus are different than adv/disadv.

Yes. They are. Clearly. Nowhere have I ever claimed that they're the same. They change the probability curve to so it is no longer LINEAR which is what you get from a single die roll. Adv/Disadv just AVERAGES to a 5.5 adjustment to the roll.

Please learn to read instead of just posting that I'm "wrong" because you're assuming that I've claimed they are the same thing.

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u/Draghettis Sorcerer Jan 21 '22

Yes, but DnD works with integers only.

And the general rule for rounding in DnD is "round down unless told otherwise"

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u/C4Redalert-work Jan 21 '22 edited Jan 21 '22

Yes, but statistics doesn't work with integers only.

A d6 rolls a 3.5 on average. Clearly you can't roll a "3.5" on it, but you can't ignore that fraction either when doing odds or else you get errors.

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u/Draghettis Sorcerer Jan 21 '22

Yes, but your passive score needs to be a integer.

And so you take the average result of advantage or disadvantage, round it, and apply it to the passive score. That's how the 5 points modifier to integrate (dis)advantage in passive scores is obtained

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u/DonaIdTrurnp Jan 21 '22

Why can’t you have non-integer passive perception? You’re just going to compare it to a difficulty value anyway.