3 entries in Cards / Principles / Stacked Deck Stuff / Think-a-Card Stack
  
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Karl Fulves Virus Variation
Inspired by Latter Day Secrets (Issue 10) 431
Joseph K. Schmidt Computer Virus Killer "A Novel Revelation of Two Thought Cards"
two spectators think cards from a five-card and six-card group, involving virus gag card
  • The History (credit information and references)
Inspired by
  • "Brain Twister" (Ben Braude, Hugard's Magic Monthly, Oct. 1946)
Variations
Latter Day Secrets (Issue 10) 429
Steve Beam Si Kick cut pile behind back, then performer asks question about thought selection and always removes cards which do not match, red or black etc.
Variations Semi-Automatic Card Tricks — Volume 7 163