0 a symbol or piece of text in a mathematical expression or computer instruction that can be replaced by particular pieces of information
The natural deduction style follows the same "typical application" idea, but with variables as the placeholders.
Similarly, exact values may be mistaken for placeholders, resulting in a poor quality product or rework.
The novel actions are more meaningful when performed with the schematic than with the placeholder objects because they provide clear end results.
Here ' situation ' is a placeholder, to avoid mention of impossible worlds yet suggest that something has to take their place for evaluation of counterpossibles.
Terms in the placeholder machine include labels on placeholder-strict arguments.
One comparison was made between the familiar and novel actions tested with the placeholder objects.
Experiment 2 tested familiar three-step event sequences in which a placeholder object was substituted for the second step in half the events.
Note that different occurrences of the placeholder in the same term can match different terms, so there is no need to consider substitutions.
