PDF here: http://online.liebertpub.com/doi/pdf/10.1089/space.2017.2900...
Interesting Venn diagram in Fig 2. If "COST OF TRIP TO MARS" = "INFINITE MONEY", shouldn't "CAN AFFORD TO GO" be an empty set?
Interesting Venn diagram in Fig 2. If "COST OF TRIP TO MARS" = "INFINITE MONEY", shouldn't "CAN AFFORD TO GO" be an empty set?
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