Alternative Disadvantages

Alternative Disadvantages is proposed by Walrus on 20 May 2016 http://forums.sjgames.com/showpost.php?p=2006666&postcount=19
:What about Alternative Disadvantages?
:The example is a creature with snail-like eyes on antennae. If it doesn't have 360 degree vision, it's more like Tunnel Vision (retracted eyes) with alternative Easy to Hit Eyes (eyes on antennae).
:How would you build such disadvantages?
PK responded the next day http://forums.sjgames.com/showpost.php?p=2006904&postcount=21
Disadvantage A + Reciprocal Advantage A (Temporary Disadvantage B).
Tunnel Vision [-30] + No Tunnel Vision (Temporary Disadvantage, Easy to Hit Eyes, -5%) [29] = -1 point. A quirk, which is about right considering that one of these is already just a -5-point disadvantage and you're basically asking for the ability to switch around your disadvantages so you can choose the one that inconveniences you the least.
BTW, a quick formula for this, as long as both disads are no worse than -80 points, is (A*B)*(-0.01). For the example above, (-30*-5)*(-0.01) = (150)*(-0.01) = -1.5, which rounds up to -1.
Category:Rules