public function where(array $conditions) {
		// for each provided strict condition
		foreach($conditions as $column => $value) {
			// secure the column name
			list(
				$column, 
				$placeholder
			) = Convert::columnToPlaceholder($this->Quote ,$column);
			// save the condition
			$this->Conditions[] = "{$this->Operator} ( {$column} = :{$placeholder} )";
			// save the value
			$this->Values[":{$placeholder}"] = $value;
		}
		// return self to the next method
		return $this;
	}