Which concepts are you offering for consideration.
It's impossible to say for certain, as the answer depends on which speakers are in question.
The singular of Theses is thesis.
In Western Civilization, the Magna Carta in England and the Bill of Rights in the U.S. Constitution, represent two major classifications. Theses are worth reviewing!
Theses on Feuerbach was created in 1888.
The Ninety-Five Theses was created in 1517.
Theses on the Philosophy of History was created in 1940.
Martin Luther posted the 95 theses in Wittenberg.
The word theses is plural; the singular form is thesis. Examples:singular: I will write my thesis over the holiday.plural: The teacher had twenty two theses to grade.
Martin Luther posted the 95 Theses.
There were 95 Theses and it was in 1518
the Castle Church in Wittenburg
Martin Luther wrote"Ninety-Five theses" on October, 31st, 1517.