Uncertain examples

<?php
require 'examples/boot.php';

use Cognesy\Instructor\Extras\Scalar\Scalar;
use Cognesy\Instructor\StructuredOutput;

class EstimateUncertainty {
    public function __invoke(int $k = 5) : float {
        $values = [];
        for ($i = 0; $i < $k; $i++) {
            $values[] = $this->queryHeight();
        }
        return $this->disagreement($values);
    }

    private function queryHeight() : int {
        return StructuredOutput::using('openai')->with(
            messages: [['role' => 'user', 'content' => 'How tall is the Empire State Building in meters?']],
            responseModel: Scalar::integer('height'),
        )->get();
    }

    private function disagreement(array $responses) : float {
        $n = count($responses);
        if ($n === 0) return 0.0;
        return count(array_unique($responses)) / $n;
    }
}

$score = (new EstimateUncertainty)(k: 5);
dump($score);

assert(is_float($score));
assert($score >= 0.0 && $score <= 1.0);
?>