have reason

obsolete

(obsolete) To be right. / To have grounds, justification etc. (to do something, or for something).

Japanese Meaning

正しいとされる、または正当な理由や根拠を持つ状態を表す。 / （行動や判断が）正当であると認められる、根拠がある

Though scholars laughed at her theory then, history would later show she did have reason.

当時学者たちは彼女の理論を笑ったが、後になって歴史は彼女が正しかったことを示した。

Sense（1）

(obsolete) To be right.

Sense（2）

To have grounds, justification etc. (to do something, or for something).

has reason

（ present singular third-person ）

having reason

（ participle present ）

had reason

（ participle past ）

had reason

（ past ）