public static function confirm( $question, $strict = false ) 
	{
		$question .= ' [yes/no]: ';
		
		if ( $strict ) 
		{
			do 
			{
				$res = strtolower( static::read( $question ) );
			} 
			while ( $res !== 'yes' && $res !== 'no' );
			
			return ( $res == 'yes' ) ? true : false;
		}
		
		do 
		{
			$res = strtolower( static::read( $question ) );
		} 
		while ( empty( $res ) );
		
		$positives = array(
			'yes', 'y', 'ya', 'ye', 'yeah', 'yup',
			'jep', 'jap', 'ja', 
			'si', 'sim',
			'true',
			'hai',
			'oui',
			'no problemo',
		);
		
		return in_array( $res, $positives );
	}