nil is an oddball object that always represents itself. It can not be mimicked and (alongside false) is one of the two false values.

Mimics
Inactive cells
Active cells
Specs
Inactive cells (details)
inspect = "nil"
kind = "nil"
notice = "nil"
Active cells (details)
&&(...)

nil

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macro(
  argCount = call arguments length 
  if(
    argCount ==(
      1), 
    
    then = call arguments [](
        0) 
    
    nil, 
    error!(Condition Error Invocation NoMatch, message: call message, context: call currentContext)) 
  )
?&(...)

nil

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macro(
  argCount = call arguments length 
  if(
    argCount ==(
      1), 
    
    then = call arguments [](
        0) 
    
    nil, 
    error!(Condition Error Invocation NoMatch, message: call message, context: call currentContext)) 
  )
?|(...)

nil

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macro(
  call argAt(0))
and(...)

Does not evaluate argument and returns nil

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macro(
  argCount = call arguments length 
  if(
    argCount ==(
      1), 
    
    then = call arguments [](
        0) 
    
    nil, 
    error!(Condition Error Invocation NoMatch, message: call message, context: call currentContext)) 
  )
false?()

returns true.

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method(
  true)
nand(...)

Does not evaluate its argument and returns true

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macro(
  argCount = call arguments length 
  cond(
    argCount ==(
      1), 
    
    other = call arguments [](
        0) 
    
    true, 
    error!(Condition Error Invocation NoMatch, message: call message, context: call currentContext)) 
  )
nil?()

returns true.

[ show source ]

method(
  true)
nor(...)

Evaluates its argument and returns the inverse of it

[ show source ]

macro(
  argCount = call arguments length 
  cond(
    argCount ==(
      1), 
    
    other = call argAt(
        0) 
    
    if(other, false, true), 
    error!(Condition Error Invocation NoMatch, message: call message, context: call currentContext)) 
  )
not()

Does not evaluate arguments and returns true

[ show source ]

method(
  true)
or(...)

Evaluates the argument and returns the result

[ show source ]

macro(
  call argAt(0))
true?()

returns false

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method(
  false)
xor(...)

Evaluates the argument and returns the inverse of the inverse of the argument

[ show source ]

macro(
  argCount = call arguments length 
  cond(
    argCount ==(
      1), 
    
    then = call argAt(
        0) 
    
    if(then, true, false), 
    error!(Condition Error Invocation NoMatch, message: call message, context: call currentContext)) 
  )
||(...)

nil

[ show source ]

macro(
  call argAt(0))